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How to make a female cannabis plant produce seeds

How to Make Feminized Seeds Easily at Home

If you’re not a total beginner as a grower, you probably know that male cannabis plants pollinate female plants. You may also know that only female plants produce the flowers that cannabis fans know and love.

The problem with male plants is that if they pollinate your girls:

  • The girls will produce seeds
  • Their buds will have less resin & THC
  • Your total bud yield will be lower

Growers normally buy feminized seeds from breeders and seed banks because they can count on almost all of those seeds becoming female plants with high THC and all the other goodies cannabis has to offer.

Here you will learn to feminize seeds yourself.

What is a Feminized Seed?

A feminized cannabis seed is what you get when you breed two female plants instead of a male and a female. When you plant feminized seeds, they germinate and grow into females.

The way to feminize seeds is to force females to produce pollen sacs. You can use that pollen to fertilize other females.

How do you trick them into producing male buds? Induce environmental stress or change their hormones chemically.

Choice #1 – which is called Rhodelization – is not a favorite method of breeders. It’s more complicated than changing hormones.

The trick to rhodelization is to fool the girls into “thinking” that they’re dying. A female anticipating death wants to optimize the continuation of the species. When they think they’re doomed, they will produce female seeds almost exclusively. This is because a small number of male plants can fertilize an entire room full of girls, so very few of them are needed. Cannabis pollen outdoors travels far and wide. The girls are more essential.

How to Make Feminized Cannabis Seeds by Changing the Hormone Balance Chemically

This is the most common method top breeders use to feminize seeds.

To do this, you can use one of four substances:

  1. Colloidal silver (CS)
  2. Silver thiosulfate (ST)
  3. gibberellic acid (GA3)
  4. Ethylene

You can find colloidal silver at bricks and mortar natural foods stores or through online supplement stores. If you want to make your own, there are plenty of guides online that show you how to do that.

Step 1: Grow 1 or More Female Plants

Let these ladies grow through the vegetative stage.

Step 2: Spray the Bud Sites Daily

When the buds start forming, put colloidal silver in a spray bottle and drench the bud sites once per day. The buds will develop into male-like buds that have the power to pollinate. The process will take three or four weeks. Don’t stop spraying them until the pollen-filled buds start opening and the leaf that protects the pollen begins to crack.

Warning: If any female buds form, don’t smoke them. They could be dangerous because of the chemicals.

Step 3: Harvest & Dry the Pollen Sacs

Pluck the pollen sacks. Place them somewhere that allows them to dry. The drying process should take about a week.

Step 4: Put Your Sacs in a Bag & Shake ‘em Up

You can use a can for this, too. The sacs will release pollen when you shake them. Keep your container closed while doing this so that no pollen escapes.

Store your pollen in a ziplock bag or something air tight.

Step 5: Fertilize Some Lady Plants

The best time to pollinate your plants is when they are about two or three weeks into the flowering stage. If you wait too long, they’ll produce less seeds.

Do this step in a closed room. It’s a delicate process. There are lots of tutorials online about how to pollinate cannabis. Find a good one and follow the steps.

Step 6: Harvest Your Feminized Seeds

You can tell the seeds are ready when some of them start dropping from the buds. They should be brown and not green. You may need to give the plant some nutrients or whatever it takes to keep her alive so that she can get to the seed dropping phase.

Harvest the seeds with your fingers.

Step 7: Store Your Seeds or Plant Them

Keep your seeds in a cool and dry place. Mark them with a harvest date so you know how old they are. If you store them properly, they’ll keep for a few years. You can plant them any time after harvest.

How to Make Feminized Seeds

Simply put, they are marijuana seeds created by breeding two female plants together. Since there are no male parents, all the offspring will be bud-producing female plants. Feminized seeds ensure that you can count on every plant to produce buds, and don’t have to worry about removing male plants (which cause lower yields and seedy buds if allowed to pollinate your valuable females). Ready to get started? Follow this guide to create your own feminized marijuana seeds.

Feminized seeds are commonly available from marijuana seed banks for nearly every popular or famous strain. Breeders know that a lot of people just want to grow plants for buds, and don’t care about breeding or making their own seeds (which is one of the main reasons growers want male plants).

How do seed banks feminize their seeds?
How can you breed two female plants together?

The idea is to force a female plant to produce pollen. The male flowers (growing on a female plant) create pollen, which can be harvested and used to pollinate another female marijuana plant. The resulting seeds will all end up being female. Checkout Seedsman, a trusted seed bank.

Can feminizing seeds cause hermaphrodite plants?

Growers can force a female plant to make pollen sacs, and the “feminized” pollen produced can be used to fertilize another female plant.

  • This OGX Trademarked product is used to produce feminized seeds on cannabis plants.
  • Omega Genetix is the USA leader in supplying industrial green houses for feminized seed production.
  • Omega Genetix is a 9001 ISO quality controlled laboratory.
  • OMEGA GENETIX Plant Feminizing Spray will produce all female seeds on any dioecious variety plant.
  • 100% PURE COLLOIDAL SILVER. We do not have a gimmick and it is no secret that our product is pure colloidal silver. Experience has taught us the exact voltage, amperage, time, temperature, water purity, dissolved oxygen level, and pH level for quality processing.
  • 99.9999% PURE SILVER. We use raw ore-argentite mixed with an inorganic compound that forms into a potassium solution and when combined with Zn30 forms into an alkaline solution and precipitates the silver solution that is fused together with niter and then electrolytic purify it to become pure silver to create our famous feminized solution. Our product is tested using our single particle ICP-MS to ensure the correct ppm of silver needed to feminize a plant.
  • SAFE AND EFFECTIVE. It is specifically designed for plants, however it is completely safe to humans but not intended for consumption.
  • EASY INSTRUCTIONS. Choose a plant that has not started flowering and is at least 2 weeks in the vegetative stage. Spray one entire branch 3-4 times a day for 2 to 3 weeks. When the treated branch’s pollen sacks ripen, carefully dust your female flowers with the pollen. Continue growing until feminized seeds mature, which is at least one week past its normal harvest date.⭐⭐⭐⭐⭐
  • OMEGA GENETIX LLC Plant Feminizing Spray will produce all female seeds on any dioecious variety plant.
  • 100% PURE NANOCOLLOIDAL SILVER. We do not have a gimmick and it is no secret that our product is pure colloidal silver. Experience has taught us the exact voltage, amperage, time, temperature, USP laboratory water purity, dissolved oxygen level, photosynthesis wave length exposure for ISO 9001 QA quality processing.
  • 99.9999% PURE SILVER. We use raw ore-argentite mixed with an inorganic compound that forms into a potassium solution and when combined with Zn30 forms into an alkaline solution and precipitates the silver solution that is fused together with niter and then electrolytic purify it to become pure silver to create our famous feminized solution. Our product is tested using our single particle ICP-MS to ensure the correct ppm of silver needed to feminize a plant.
  • SAFE AND EFFECTIVE. It is specifically designed for plants, however it is completely safe to humans but not intended for consumption.
  • EASY INSTRUCTIONS. Choose a plant that has not started flowering and is at least 2 weeks in the vegetative stage. Spray one entire branch 3-4 times a day for 2 to 3 weeks. When the treated branch’s pollen sacks ripen, carefully dust your female flowers with the pollen. Continue growing until feminized seeds mature, which is at least one week past its normal harvest date.⭐⭐⭐⭐⭐
How do you force a female plant to make pollen?

There are two (semi)reliable ways to make female plants produce pollen:

  1. Induce feminized pollen chemically (Recommended): This would be the “professional way” to feminize seeds and is how most reputable seed banks and breeders create feminized seeds to sell to the public. Mineral supplements such as colloidal silver and gibberellic acid are used because they cause a female plant to produce male pollen sacs if bud sites are treated daily for the first 3-4 weeks after the onset of flowering. This article will give you step-by-step instructions on how to feminize cannabis seeds using the colloidal silver method to creating your own feminized marijuana seeds.
  2. Rhodelization (Not Recommended) In the wild, some female cannabis plants will naturally start making male pollen sacs or “bananas” which can self-pollinate the plant. This happens if the plant is stressed, or if the plant is not harvested in time and buds start to die of old age. The plant is basically doing everything it can to save the next generation. The resulting seeds have a very high chance of herming and seeding your buds. This method is unreliable and not recommended but I did want to mention it as it is technically a way to create feminized seeds, however very unreliable.
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But is there a dark side to feminized cannabis seeds?

One of the biggest concerns for growers when it comes to feminized seeds is that they will produce hermies instead of 100% female plants.

‘Hermie’ is a nickname for a hermaphrodite plant. A hermaphrodite produces both female buds and male pollen. The image shows a marijuana plant that has both male pollen sacs and female pistils growing from the same node.

Even the smallest amount of pollen in your grow room can seed your buds, just like a male plant would. A hermie plant can be a lot easier to miss than a male plant since it may just be a small part of the plant that’s is producing pollen sac(s).

Males make themselves known at the beginning of the flowering stage, but a hermie plant may grow only buds except for just one or two tiny pollen sacs, or a few yellow hermie bananas.

Is it True that feminized seeds can cause hermies? Yes!

Many growers believe that feminized seeds cause hermies, and there is some truth to that. In order to create a feminized seed, one of the parent female plants had to be forced in some way to produce pollen.

That pollen is used to pollinate another female plant, and the offspring of those two plants will all be female since both of the parents were female. That’s how you get feminized cannabis seeds. But it also means every time you have a feminized seed, that seed had a plant that was forced to hermie at some point in its genetic past.

There are different ways to feminize seeds, but only some methods produce seeds that hermie.

It’s important to understand that hermies can happen in several different ways. And the different types of hermies affect what genes are being passed on to the seeds.

What Causes Hermies?
  • Bad Genetics: the plant comes from a line of plants that naturally create hermies
  • High-Stress : high temperatures, light leaks, inconsistent light schedules, and other types of major stress can cause a perfectly healthy plant to hermie, although some plants/strains are more susceptible to stress than others
  • Over Maturing Plants: this is also known as rodelization as we touched on earlier
  • Chemical Stimulation: exposing a female plant to certain substances like colloidal silver or gibberellic acid during the early parts of the flowering can force any female plant to create pollen. This is how seedbanks get female pollen to produce feminized seeds.

Seeds created from hermie pollen will turn out to be female – at least as female as the parents.

Feminized seeds are susceptible to becoming hermies themselves when exposed to the same conditions as their female ‘father’ who produced the pollen. But since any plant can be chemically induced to produce pollen, it doesn’t mean that the ability to hermie in a natural environment is passed on to the seeds.

Only some feminized seeds come from parents with bad genetics.

Marijuana Seed Banks & Seed Breeders

Commercial breeders and seedbanks use chemical stimulation to create feminized seeds. What that means is they put specific compounds on developing female plants to force them to produce pollen.

This technique works on nearly any plant, including plants that would never hermie naturally. So it can be used to take two plants with great genetics to produce female seeds. But the same process will also work incredibly well on plants that do hermie easily all on their own. That means it’s up to the breeder to test and make sure that they have a solid plant with unbeatable genetics before using this technique.

The pollen that results from chemical stimulation is then used to pollinate another plant and make feminized seeds. If the parent plants would never hermie without chemical stimulation then you have created feminized seeds that won’t ever make pollen in your grow room.

But if one of the parent plants was chosen because it does hermie easily then you’ll end up with seeds that hermie and the breeder might not have done any testing on the parents of the resulting offspring to even know.

Without testing, a breeder can’t tell whether they’ve created quality feminized seeds.

The Overview: How to Make Feminized Seeds
  1. Buy Colloidal Silver – The Best place to get it of course is on Amazon. Read our Colloidal Silver Review.
  2. Spray the bud sites of your known female plant daily during the first 3-4 weeks of the flowering stage (until pollen sacs form and start splitting open)
  3. Harvest ‘Feminized’ Pollen
  4. Pollinate Another Female Plant
  5. Wait ~6 Weeks to Harvest Seeds

What about gibberellic acid? I’ve heard that works too. I am confident in the colloidal silver method and it works for making feminized seeds because I use it myself. I have never used it I don’t personally know anyone who has tried making feminized seeds with gibberellic acid. From what I understand it can be used exactly the same way as colloidal silver. But I’m not sure exactly how to prepare a gibberellic acid solution so I chose to stick to sharing the information that I know about and what I know will deliver results for you to create your own feminized marijuana seeds.

Now that you’ve gotten the overview, here’s the feminization process with detailed step-by-step instructions…

Step-By-Step Guide with Pictures: Create Your Own Feminized Marijuana Seeds

Buy Colloidal Silver

Colloidal Silver is sometimes used as a dietary supplement, it’s safe and isn’t some crazy harmful chemical that you are applying to your plants. You must purchase colloidal silver that is a solution of at least 30 PPM (parts per million) of silver or higher.

Spray the bud sites (nodes) of your known female plant daily during the first 3-4 weeks of the flowering stage (until pollen sacs form and start splitting open)

The above pic shows you where pollen sacs form on the plant (same places female buds form)

When you’re ready, switch your light schedule to flowering. For photoperiod plants, wait until your plant is 5-6 weeks old before initiating the flowering stage. Some young plants seem to have trouble (and take much longer) to go through the feminization process, and their pollen may not be as fertile, so start with a more mature plant.

As soon as you change the light schedule (and maybe even a day or two before) start spraying your plants thoroughly with colloidal silver at every bud site you want to form into pollen sacs.

Spray bud sites thoroughly, drenching them with colloidal silver every single day

Important! Keep spraying daily until pollen sacs open up. Don’t stop spraying early, even if pollen sacs appear to be already formed, otherwise they may not produce much pollen!

one-hand pressure sprayer / mister is really helpful for spraying bud sites evenly and thoroughly

You can choose to treat a single bud site or all the bud sites on the plant. Any untreated bud sites will develop into female buds as usual. If you want to smoke these buds, it’s incredibly important to avoid letting them come into contact with colloidal silver as that’s not safe to smoke. (Don’t worry, feminized seeds don’t contain any silver). I highly recommend letting the whole plant be your test subject so you don’t have to worry about that

Auto-flowering strains – If you’re feminizing an auto-flowering plant, start spraying daily when the plant is about 20 days old from seed. This is when most auto-flowering cannabis strains start making flowers.

Harvest Your Feminized Pollen

When pollen sacs are starting to crack and look like they’re about to open up (or if you can see one has already opened) then your pollen is ready for harvest!

When pollen sacs are cracking and opening up, you’re ready to harvest your pollen!

Pollen spilling onto a nearby leaf

hermie pollen sac

One way to harvest your pollen is to gently and carefully remove all the pollen sacs. Let them dry for a week, and then put them in a resealable bag. If you shake the bag the pollen should easily spill out. You may need to cut a few open yourself.

How to Store Feminized Pollen: Moisture is your main enemy when storing pollen. It can help to double the mass of the pollen collected by adding regular cooking flour. This absorbs moisture during storage and as an added bonus, it will make application easier when you get to pollinating. If you triple-bag the pollen-flour mixture and stick it in the freezer (with a good nametag so you know where the pollen came from), your pollen can be stored for a year or longer.

Pollinate Another Female Plant

When your chosen mother is 2-3 weeks into the flowering stage, take a paintbrush and ‘paint’ your feminized pollen on the developing bud sites you want to pollinate. Bud sites (for both male and female plants) are located wherever you can see leaves meet a stem.

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Only the buds that come in contact with pollen will grow seeds. You can choose to pollinate all of your buds or just a few on the plant.

Make sure that you’re touching all the female pistils/hairs with your pollen. Here’s a little video showing you exactly what this looks like!

Wait ~6 Weeks to Harvest Seeds

It usually takes about 6 weeks for your feminized seeds to fully develop. Some plants are literally dying right as the seeds become ready, so to get the most viable seeds, you need to try to keep them alive until the seeds actually start dropping. The seeds can be used right away or stored in a cool, dry place for a few years. Don’t forget to label them with the date!

This seed is about to burst out of its calyx!

This is what it looks like when the seed is exposed

Now you can germinate your feminized seeds and see if your feminized seeds produce something different than its parent(s) or if its an identical, amazing, bud producer exactly as you had planned.

And that is that, you have created your own feminized marijuana seeds just like the pros!

Plant at the onset of flowering

9 days of colloidal silver spray

12 days of colloidal silver and male pollen sacs are forming

Continue spraying colloidal silver until pollen sacs have begun to open

Collect as much pollen as you can. I prefer storing pollen in glass, in a cool dark place

Before we wrap this one up, a few thoughts on basing your entire grow and future grows using your own feminized seeds.

Despite what some may believe or would like you to believe, breeding plants is not easy and requires a lot of time, knowledge and luck.

Without careful and thorough testing, it may be possible to accidentally select for cannabis plants that tend to herm (make male flowers or pollen) and cause seedy buds when you don’t want them to.

For each possible ‘mother’, clones should be grown in several different environments and tested thoroughly to make sure that the mother plant does not have any tendency to make pollen naturally in normal or stressful conditions. It’s okay if plants grow pollen sacs if induced chemically, but you don’t want plants that will start growing male parts on their own. Thorough testing of plant’s hardiness is always important when breeding, but it is especially important when breeding feminized seeds together.

If you don’t already have good strains to work with, buy seeds and start with reliable genetics to then start creating your own feminized seeds. Checkout the reviews for where to buy marijuana seeds here, or checkout the seedbanks below.

Make sure your read our Colloidal Silver Review as well, a key element to create your own feminized marijuana seeds

If you are interested in breeding, you can learn a lot from our Breeding Post. It will give you a headstart on your new adventure of breeding the weed the world has ever encountered.

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How to make feminised cannabis seeds

Until the 1990s, any cannabis cultivator was aware that, at some point, they had to separate the male and female plants if they didn’t want the first ones to pollinate the latter, which results in plants completely full of seeds. However, those were the days when pioneering seed banks like Dutch Passion were revolutionizing the cannabis scene with the birth of the first feminized cannabis strains, or in other words, seeds that only develop into female plants. At the beginning of the 20th century, many seeds banks were offering this type of seeds, feminized versions of classics strains that had been cultivated during many years as regular plants.

We are sure that by now you’d probably have grown some feminized seeds, maybe even though you are a purist and the fiercest defender of regular seeds. But. do you know where feminized seeds come from? Are you familiar with the processes used by both breeders and growers to obtain them? In this article we explain everything!

Feminized cannabis seeds quality control

Advantages of growing feminised seeds

Indeed, the advent of feminized seeds brought about a genuine revolution within the cannabis sector. Growers were now sure that all their plants would be females, without the need to differentiate between male and female plants or having to remove the males before they could ruin the crops, which offers a number of benefits of significant importance:

  • Space and resources saving: no more growing plants which eventually will be removed for being males.
  • Reliability: it’s not that most plants are female, or that they are genetically more likely to produce female plants. The plants grown from feminized seeds have only female chromosomes (XX), therefore this method is 99% reliable.
  • Sinsemilla plants: by not having males in the grow room, your female plants won’t be pollinated, so they won’t produce any seeds during the flowering period (something that every cultivator wants, unless they want to obtain seeds)

These advantages were of great interest for the growers, and soon feminised seeds accounted for a large portion of the seeds available in the market. In addition, being able to use only female plants (generally known and selected clones) to produce seeds had another great advantage for seed producers and breeders of new varieties: they no longer need to keep males in their gene pools! And not only that. from that moment on, any female plant they could get their hands on could be used as a male to pollinate other plants, thus exponentially increasing the possibilities of creating new crosses.

Outstanding Orange Candy feminised from Philosopher Seeds

It is not surprising, therefore, that at present, feminized seeds represent virtually all the seeds in the market, since they offer a number of significant advantages for both professional and home growers and breeders, for photoperiod and autoflowering plants. The main disadvantage of this method is a well known and hotly debated issue: the growers who buy this type of seeds cannot produce their own seeds in the absence of male plants, so the only way they can manage it it’s using the same process to obtain this type of seeds. But. what are these processes and what are they based on?

Female crosses: feminised cannabis seeds are born

As we’ve already mentioned, feminized seeds are the result of a process that reverses the sex of a female plant, that is, she is forced to produce male flowers. This way, and once into flowering, the female chosen will start to develop what we know as male flowers (stamens and anthers), which, just like male plants, will release the pollen that will pollinate the female plants. What is then the difference between a male plant and a reverted female plant?

The sex of cannabis plants is determined in the same way as ours, through the so-called sex chromosomes or genosomes. Male plants have a couple of different sex chromosomes called “XY” or heterogametic, while female plants have two chromosomes called “XX” or homogametic. When crossing a male (XY) with a female (XX), we will obtain around half of the plants of each type in their offspring. In other words, when a breeder uses a male and a female plant, the seeds produced by them will be approximately 50% males and 50% females.

After this explanation, many of you will have already figured out that if we cross two female plants (reversing the sex of one of them to force it to produce pollen), the result will be seeds that will produce female plants, as there are only female sex chromosomes in the equation. If crossing XY with XX produced 50% of each class (male and female), crossing XX with XX will produce plants that only exhibit chromosomes XX, that is to say, female plants. No matter how many times we “transform” a female plant into a male plant, we won´t be changing their genetic composition, which will still be female or XX. This way, the pollen produced by this plant will pass down female sex chromosomes exclusively.

Feminised seeds grown indoors, 100% female plants

As you can see, and although we normally use the expression “reversing the plant sex“, that is not exactly what is done, because the sex chromosomes of the female plant (XX) have not changed, even if we managed to produce male flowers. This “sex change” of female plants can be achieved in a number of ways, but usually with the same goal: to reduce the level of ethylene in plant tissues and/or inhibit the ethylene action, which makes the plant develop male flowers on entering the flowering period, as if it were a male from regular seeds. This is because ethylene is a natural regulator of the sex expression in plants!

See also  Medical mass seeds

Let’s see now the most popular ways to reverse the sex of a female plant in order to produce feminized seeds.

Methods used to produce feminized cannabis seeds

There are several ways to secure that a female plant produces pollen, and almost all of them require some type of chemical that is often sprayed on the plant. Once sprinkled with the chosen product and under a flowering photoperiod, the plant will flower normally, but as a male instead of female, producing ‘feminized’ pollen (which only contains chromosomes XX) that can be used to pollinate other females in order to produce seeds. These are some of the most commonly used techniques:

Stress or rodelization

One of the first methods used to obtain seeds that produce female plants was stress or rodelization. There are several ways to stress the cannabis plants to make sure they develop male flowers, such as through temperature, nutrition, photoperiod, and pH. However, supporters of this technique often prefer something as simple as delaying the harvest 2-3 weeks in order to force the plants to develop a few male flowers without stressing them as much as with any of the other methods we have mentioned.

Although this action will produce far less pollen than other techniques like STS, it will be enough to obtain a handful of seeds for the domestic growers to try to create their own feminized crosses. Also, the great advantage of this technique is that is 100% natural, and it doesn´t use any chemicals. It is an excellent alternative for anyone who just wants a few seeds and wishes to keep it simple without any formulas or laboratory products. However, bear in mind that this is the only method listed in this post that may produce some plants with hermaphroditic traits.

Male flower produced by rodelization

STS or silver thiosulfate solution

Without any doubt, one of the most commonly used methods for both producers and seed banks. This is a solution made of distilled water, silver nitrate and sodium thiosulphate (sometimes called sodium hyposulphite) that, after being sprayed on the female plants, inhibits their ethylene action resulting in the formation of male flowers once flowering has been induced. STS is relatively easy to prepare, although its lifespan after combining the two components is quite limited, barely a few days as long as it´s well preserved (in a dark and cool place).

It is important to mention that you must not consume any part of the plants sprayed with this type of product, although that would be weird, as the plants have “become” males and won´t produce any buds. Nevertheless, you shouldn’t use the reverted plants to make resin extracts; the best thing is to discard them after harvesting the pollen. Both components, sodium thiosulphate and silver nitrate, are also used for photo-development.

Colloidal silver

This is another way to revert the sex of the plants, but this time using a solution made of 30ppm colloidal silver (that you can easily find in many pharmacies and also online) and distilled water. The solution must be applied for a few days until the plant starts producing male flowers, something that it´s not necessary with STS, where in most cases one single application is enough.

Colloidal silver is formed by electrically charged silver nanoparticles and has antibacterial and antifungal properties. This product was introduced in the market in 1980 for therapeutic use. However, as with STS, you should get rid of the sprayed plants once their pollen is harvested, as colloidal silver is absorbed systemically by the plant and remains in its tissues.

This sativa plant treated with STS started flowering as a female but soon developed male flowers

Silver nitrate

This is a method researched by Mohan Ram, who also conducted extensive investigations on plant sex reversal with STS. According to his findings, sodium thiosulphate (STS) is more effective in producing male flowers and viable pollen in female plants. Probably because of this, silver nitrate is mixed with sodium thiosulphate, instead of using it in isolation.

Gibberellic acid

Gibberellins are plant hormones that help regulate various processes related to the development of the plants. There are several types of gibberellins available in the market, although the most common and effective is gibberellic acid or GA3 (Gibberellin GA3). This product is used in a very similar way to colloidal silver, sprayed on the plants during several days before switching the photoperiod over to flowering.

It is worth stating that one of the side effects of gibberellic acid is a significant stretching of the treated parts of the plant, so don’t be surprised if this happens to your plants! The recommended dose to achieve the best results is approximately 100ppm.

Urban legends and lies about feminized seeds

Despite the fact that, after two decades of cannabis cultivation, many of the false myths surrounding feminized seeds have been debunked, from time to time we still hear some arguments like the ones shown below. As is often the case, many of these stories are spread by people who have never grown this type of seeds or have none or very limited experience with them. Ignorance is always a bad thing, and that’s why we want to emphasize several points in relation to feminized seeds and the myths that often go with them; myths such as the following:

Feminized seeds produce hermaphrodite plants:

The problem with monoecious hermaphrodite plants has more to do with the parents used (and if they exhibit any hermaphrodite trait) rather than with the type of seeds produced. If to create a feminized seed you use a female plant with a tendency to produce male flowers, part of its offspring will likely inherit that characteristic, whether the said female plant is used as a pollen donor (after reversing its sex) or as a recipient of pollen (letting it flowering as usual). Yet the same thing happens when producing regular seeds: if the male or female parents are not stable in this respect, neither will be their offspring (or at least part of it).

Marijuana and hermaphroditism

Many growers have been surprised by the presence of hermaphrodite plants in their marijuana crops. In this post we will tell you how to detect them and how to proceed if you find a hermaphrodite cannabis plant in your growing space. We will also discuss the causes of this hermaphroditism.

Feminized seeds produce mutant plants:

Nothing could be further from the truth. It is true that sometimes some plants develop weird traits or mutations, although this also happens with regular seeds. Unfortunately, there seems to be not enough studies comparing the ratio of specimens with mutations of one or other type of seeds; however, given the millions of feminized seeds that have been germinated in the last 20 years, if mutations would pose a problem, the quantity of feminized seeds sold would certainly not be so high, and this would be a “public security” issue within the cannabis sector, both for the growers and the producers of the seeds.

Feminized seeds have chemicals:

This is another lie that some people believe. As it’s been mentioned before, a female plant is sprayed with some chemicals in order to inhibit its ethylene action. After a few weeks of this and once in the flowering period, the plant will produce male flowers and pollen, which will be harvested to pollinate the female plants designated to produce seeds. Once the seeds are formed, they are collected and packed immediately, so they don’t come into contact with any chemicals or the plants that produce seeds, nor, of course, with the seeds themselves. Also, to produce cannabis seeds, you normally need two separated indoor cultivation areas, one for the reverted plants (treated females) and the other for the females to be fertilized to produce the seeds, so the latter can’t get “contaminated” with any chemicals.

Feminized seeds are GMOs:

Once again, this is a false statement. We have already pointed out that by using these sex reversal techniques we inhibit the ethylene action in the female plant, and under no circumstances the seeds (or plants) are genetically modified. The sex chromosomes of the female plant converted into a male plant are still female (XX), nothing has changed at a genetic level.

We hope you found this article interesting; even today, many people are still unaware of the intriguing process behind this type of cannabis seeds. Do not hesitate to leave your comments; we will be delighted to answer them.

  • Marijuana Botany, Robert C. Clarke
  • The Cannabis breeder’s Bible, Greg Green
  • The Cannabis grow Bible, Greg Green
  • Breed your own vegetable varieties, Carol Deppe
  • Induction of Fertile Male Flowers in Genetically Female Cannabis sativa Plants by Silver Nitrate and Silver Thiosulphate Anionic Complex, Mohan Ram, Sett R.

The articles published by Alchimiaweb, S.L. are reserved for adult clients only. We would like to remind our customers that cannabis seeds are not listed in the European Community catalogue. They are products intended for genetic conservation and collecting, in no case for cultivation. In some countries it is strictly forbidden to germinate cannabis seeds, other than those authorised by the European Union. We recommend our customers not to infringe the law in any way, we are not responsible for their use.