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Using silver to femize cannabis seeds

How to Make Feminized Seeds with Colloidal Silver

We describe an experiment which gave us about 1500 fem seeds from a 20-inch weed plant using colloidal silver and self-pollination

We were curious how easy it was to make feminized seeds with colloidal silver at home. So we ran a little experiment and got more than 1500 viable beans without any issues. You too can do the same and make a nice stash of female plant seeds for yourself by following these step-by-step instructions.

But let’s start with a bit of theory (you can skip this part and get down to business straightaway).

Table of Contents

What are Feminized Seeds, and How are Seeds Feminized?

In nature, cannabis plants have two distinct sexes: male and female. However, only female plants produce buds for smoking. And if these buds catch some pollen, they will be subpar in quality because they will be full of seeds and not so big and also less resinous. That’s why growers who use regular seeds must watch their plants closely and cull all males in their garden as soon as they reveal their sex. Not very convenient, is it?

It all changed with the introduction of seeds that grow into fem plants in 99% of cases. They were named feminized seeds. So, are feminized seeds always female? In the majority of cases, yes, they are guaranteed to be female. However there are ways to make fem seeds hermie, meaning they will turn male or at least produce a few male flowers inside female buds. This can happen for seeds with weak genetics, or it can be a reaction to stress.

Male Plants no Longer Necessary

And this is exactly the feature that is used for manipulating feminised plants into producing feminised seeds. You don’t need any males for that. If you use a male to pollinate a plant grown from a fem seed, the result will be a bunch of regular seeds. And if you want fem seeds only, you should use one female plant as mother and another female plant as father. Or, alternatively, you can opt for self-pollination: when a single plant is used to both produce pollen and grow seeds.

There are several methods to make a feminised plant turn male. We won’t discuss here the most barbarian one — when breeders subject their plants to high levels of stress and they are turning hermie as a result. Although, believe it or not, the first commercially available seeds were made exactly this way, back in the early 1990s. You may guess the obvious drawback of such seeds: plants grown from them often become hermaphrodites even under normal conditions.

There is a less invasive method that modern breeders use. I’m talking about spraying a plant (or an individual branch of a plant) with a colloidal silver solution. This changes the chemistry inside the plant to make fem seeds male, and does so without any stress. As a result, we get seeds on a female weed plant without making them prone to hermies.

How to Make Feminized Seeds Using Colloidal Silver Spray

First, you need to make a colloidal silver generator and use it to produce the solution for your feminized seed spray. It’s unbelievably cheap, quick, and easy. Judge for yourself by clicking the link above and reading our step-by-step guide. The result should look more or less like this:

You should start using your feminised seed spray on a plant as soon as it starts flowering. You can apply it on all branches or just one. In the latter case, cover the rest from spatter. Please remember that silver is a toxic heavy metal and can poison you. You should never smoke colloidal silver weed.

It had taken us 4 weeks before we saw clearly that male flowers began to form. It was our first experiment, and we wasted many days applying the solution with a paintbrush. Don’t do that. It’s stupid. Just cover the rest of the plant with a piece of plastic and spray the chosen branch until it’s thoroughly wet. Do it once a day.

At some point, you’ll notice little green balls appear among female hairs (pistils): first closer to the top, then further down. Continue to apply colloidal silver spray until male ‘balls’ completely oust female pistils and start to look like a bunch of grapes. Only then you can stop spraying.

And this is how another branch on the same plant looks. It was not sprayed, so it only has female flowers:

After another month the male flowers will turn yellow and start to open:

Pollen Everywhere

Pollination is in full swing now, even if you don’t see the pollen. It consists of millions of tiny particles, and they fly everywhere.

Btw, pollinating buds at such a late stage of flowering is not the best idea. It would be better if the male pollen were ready a couple of weeks earlier, when the buds weren’t that mature. That would result in a) more seeds, b) less time spent, and c) better quality seeds. Well, we’re not sure about c), but some people on forums say it’s true.

When the branch with male flowers on it is fully mature, cut it, place it on a table, and rub it with your fingers until all yellow flowers fall off:

Then move the flowers this way and that with a credit card. The pollen will stick to the card’s edge. Shake it off into a separate heap:

To store and later use the pollen more conveniently, you can mix it with the equal amount of flour:

We put the mixture into an empty gelatin capsule and placed it in the refrigerator for storage..

Let me stress that we never used the pollen harvested this way to sprinkle on the plant. All pollination happened before we cut off the male branch. The seeds were fully mature 3 weeks after that. In this photo, you see only some of them. Later, we harvested at least as much.

How Soon Can You Plant Seeds After Harvesting Them?

We spent some time looking for an answer. People on forums say that the fresher the seeds, the lower germination rates. If you want to have good germination, give your homemade seeds some time to dry. Let’s say a month or two. It would be enough to degrade the hormone that prevents seeds from sprouting.

Our Experiments with Self-Pollinated Feminized Seeds

Over the next couple of years, we did a lot of experiments with our homemade seeds. The germination rates were always close to 100%, although, we must confess, we handled the process in a most off-hand manner. It’s understandable when the seeds cost you pennies.

We brought several plants to maturity and can say that they are very true copies of the parent plant. All fems, no hermies. All start to flower automatically after 2.5-3 weeks, all have the same height as the parent, the same length of the flowering period, the same structure of buds, and the same type of high. We liked the original plant, so we also liked its copies.

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To Recap

Making your own feminized seeds is fairly easy. If you want to make copies of an autoflower, this is the only way. If you want to copy a photoperiod strain, it works great as well, but you also have the option of taking cuttings. Cloning marijuana is quicker, but seeds are easier to give away or sell. Believe us: with our little harvest of seeds. we’ve made a lot of people happy.

How to make your own feminized seeds using Colloidal Silver or Rodelization

There are two main methods to create feminized cannabis seeds:

  • colloidal silver method or
  • rodelization (sometimes spelled “rhodelization” or “rodilization”)

Both the colloidal silver method and the rodelization method are described in detail below if you scroll down. Rodelization is a more “natural” way to get seeds, while colloidal silver gives you more control of the feminization process. Each of the methods has its pros and cons.

For whatever reason, when a colloidal silver solution is sprayed regularly on female cannabis plants during the early flowering stage, she will grow male “balls” (which are full of female pollen) instead of growing buds.

This allows the grower to collect pollen from a female cannabis plant. You can use this all-female pollen to pollinate another female plant. With two female plants as parents, ALL the seeds will end up being female.

That is why colloidal silver allows can be used to create female x female cannabis crosses and produce feminized seeds.

Rodelization takes advantage of the fact that a female plant will try to pollinate herself as a last resort when she doesn’t get pollinated and is nearing the end of her life cycle. That is why sometimes older or stressed female plants grow a few male “balls” as a last-ditch attempt to self-pollinate. When successful, she will grow a few seeds.

These self-pollinated seeds will have gotten both sets of genes from the same female plant, so both parents will be female, and all resulting seeds with be female.

Why do you want feminized seeds?

When growing regular cannabis and trying to produce seeds, the resulting seedlings end up being about 50% male and 50% female.

This can be a big disadvantage for the cannabis grower because male marijuana plants do not produce very much THC or other psychoactive cannabinoids.

Therefore, when growing cannabis indoors, most growers will throw away all male cannabis plants as soon as they’re discovered. However, it’s easier to not have to worry about males since identifying and removing male cannabis plants can be a bit of a pain. Plus, male plants also take up precious space in the grow room until their gender becomes apparent when they are forced to start flowering.

Another problem with male cannabis plants is that they can accidentally pollinate your female cannabis plants which will cause them to concentrate on making seeds instead of making sinsemilla.

Sinsemilla is the term for cannabis flowers/buds that don’t contain any seeds. Dried sinsemilla is what most growers are trying to produce when growing cannabis.

So what can you do? If you create feminized cannabis seeds, then all the resulting plants will be female and you never have to worry about male cannabis plants again.

While there are a few different ways to create your own feminized cannabis seeds, for some people making your own feminized seeds may be impractical. If you are looking for a discrete, dependable seed bank, I personally recommend Seed Supreme. They have proven to be trustworthy (at least as of November 2021 during the time of this writing) and have a huge selection of feminized seeds. However, seed banks change so it’s always a good idea to double-check our seeds list for recommended seed sources as we update it regularly based on feedback from our readers.

How it Works

The main method used to create feminized seeds is to take a known female cannabis plant and force her to grow male pollen sacs and produce pollen.

You can then take this all-female pollen and use it to fertilize other females. Because all the genetic material comes from females, you will end up with seeds that are 99% female.

So far for me, it’s worked 100% of the time. Any male plants that do result when growing feminized seeds are probably genetic females that are growing with male characteristics.

There are several processes by which female plants will grow male characteristics. Some female cannabis plants will start growing male organs if they are left in flowering for too long, as a last-ditch attempt to pollinate themselves since they were not pollinated by any male plants.

Some female plants will also show male characteristics as a result of heat and light stress. But for the grower, the most convenient way to get a female cannabis plant to make pollen is to treat her with a solution known as colloidal silver.

Below I will first explain how to make feminized Cannabis Seeds using colloidal silver, then I’ll briefly explain the all-natural rodelization method, which is an all-natural though less reliable way to get feminized seeds.

Use Colloidal Silver Spray to Make Feminized Cannabis Seeds Like the Seed Banks Do

Pros:

  • You’re able to produce feminized seeds using any two female cannabis plants (even clone-only strains!)
  • You can produce seeds consistently
  • You can control how many seeds produced
  • Easy to make hundreds of feminized seeds if needed

Cons:

  • You will need to find a source of colloidal silver which will be used to spray the cannabis plants as they start flowering. Your main options are: buying colloidal silver directly, buying a colloidal silver generator, or making your own simple colloidal silver generator yourself (instructions below)
  • It is not safe to directly use/consume any cannabis which has come into contact with colloidal silver, though any seeds produced by a treated plant’s pollen are 100% safe. Note: Some space-starved pot farmers will use the colloidal silver to spray just the bottom branch of a cannabis plant so they can still smoke/use the rest of the cannabis buds. You can do this, just be extremely careful not to get any colloidal silver spray on any part of the cannabis that you will be consuming. See this page (https://nccih.nih.gov/health/silver#hed2) for more information on the risks involved with using colloidal silver.

When a female cannabis plant is treated with a solution of tiny silver particles suspended in distilled water, the plant will start to exhibit male characteristics.

This solution of silver in water is called colloidal silver and can be purchased from a pharmacy/online or easily made at home . Or you can make it with a colloidal silver generator.

Some people drink colloidal silver for its health benefits and others use it occasionally on plants to help control bacteria, insects, and fungus growth on the leaves.

To take advantage of this, you thoroughly mist a female cannabis plant with colloidal silver every day right when she enters the flowering stage, she will start growing male “balls” full of pollen. Keep misting the plants daily until you see the beginning of male pollen sacs forming, usually around 10-14 days.

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The concentration of silver ions in the water acts as an ethylene inhibitor/antagonist on the plant, which forces the plant to create male pollen sacs instead of female buds.

After the balls start forming

You need to let the sacs swell like a big empty balloon.

You will be able to tell when they are about to open because the leaf section protecting the pollen starts to crack.

At this point, simply take the pollen sacs off and place them in a cool dry place for a week and let them start to dry.

The pollen will come out if you shake them about a little, or you can also cut open the sacs to get to the pollen inside.

Use this pollen to pollinate female plants and you will get all-female seeds that are a mix of both their mothers.

This method is great because it will force almost any female cannabis plant to show male characteristics.

Unlike the rodelization method described below, you are not selecting plants that show hermaphrodite traits. The genes of the plant are completely unaffected. This method will also produce a lot of pollen consistently compared to the rodelization method.

The one downside to this method is that it is not safe to use any cannabis that has come into direct contact with colloidal silver.

You should, therefore, destroy the plant after the pollen has been collected.

You will also want to ensure that you clean any remaining traces of silver off your equipment in case you accidentally contaminate another cannabis plant with silver.

Here are the main things to keep in mind when using the colloidal silver spray method:

  1. Make sure you spray the cannabis with a strong enough colloidal silver solution (at least 30 PPM of silver)
  2. Spray the cannabis thoroughly to almost drench all the parts you want to turn into pollen sacs
  3. Spray the cannabis regularly, at least once a day for 10-14 days, starting when you change the lights to 12-12
  4. Spray the cannabis with colloidal silver every day until you see signs of male pollen sacs forming. Some hardy strains may need over 2-3 weeks spraying before they ‘turn’.
Where to Get Colloidal Silver

Colloidal Silver is created by submerging two pieces of pure silver in distilled water and then running an electric current between the two pieces of silver. The electric current will cause silver ions to be deposited in the water which creates a colloidal silver solution.

Buy Colloidal Silver: You can buy colloidal silver which has already been prepared and is ready for use. If you’re purchasing colloidal silver, try to find a solution that has at least 30 PPM (parts per million) of silver. However, buying Colloidal Silver that is already prepared can get expensive.

Buy A Generator Kit: A better option is to buy a relatively cheap colloidal silver generator to easily make your colloidal silver. This Colloidal Generator kit comes with everything you need including silver. All you need to do is provide the water and a container.

Make Your Own: You can make your own colloidal silver generator at home. The diagram below should illustrate what you need to do.

Items Needed:

  • 9-volt battery
  • 9v Battery Connector (less than $2 at a hardware or electronics store)
  • Pure .9999 or 999 Silver (yes it must be pure)
  • Distilled water (yes it must be distilled)
  • Alligator clips (Optional: but will make things much easier) (Optional: only needed if you want to use alligator clips)

The diagram above will show you how to easily make colloidal silver to make feminized cannabis seeds

When you first connect everything, you may be surprised because it will seem like nothing is happening. You will know if it worked by the next day because the whole process will leave a silvery residue on your silver. You may need to use sandpaper or something else rough to clean your silver each time after creating a batch of colloidal silver.

If you don’t have a soldering iron and would still like to solder alligator clips onto your battery connector, then I recommend going to a hardware store and asking someone if they will help solder it for you.

Remember to keep your resulting colloidal silver solution away from any light or it will deteriorate and turn a dark gray color. If this happens, then you can no longer use the solution for creating feminized seeds.

Avoid most problems when making colloidal silver by:

  • using pure (distilled) water
  • using pure (999/.9999) silver
  • giving electrolysis enough time to work so you don’t get a weak solution (at least overnight)
  • make sure the solution has as little contact with light as possible until you use it

How to Make Feminized Cannabis Seeds Using Rodelization

Pros:

  • All-Natural
  • Very Simple

Cons:

  • Unreliable
  • May not produce many feminized seeds

The Rodelization method is all-natural and is the simplest method to create feminized seeds, but it is also unreliable and may not produce much pollen. The premise is that some female marijuana plants will start growing male pollen sacs/sex organs if they’ve been left in flowering too long (past the peak point of harvest). This is a last-ditch attempt by the marijuana plant to pollinate itself so that it at least produces a few seeds. You can collect these male pods and use the pollen inside them to pollinate other female plants. You pollinate female plants by evenly covering their buds with the pollen after they’ve been flowering for 2-3 weeks. Females that are pollinated in this way will start growing all-female marijuana seeds. If you’re very careful, you can pollinate only some of the buds on a plant that will produce seeds, and leave other buds alone so they can still be used for consumption.

This issue with this method is that some strains of plants never seem to grow male characteristics naturally. Additionally, with this method, you’re selecting plants that have a natural genetic tendency to show male characteristics. This can produce offspring that are more likely to show male characteristics themselves which may or may not be what you’re going for. Lastly, even when you do get male pollen sacs from a marijuana plant in this way, there tends to be a lot less pollen than from a typical male plant.

The one great thing about this method is it’s completely all-natural so you can implement this strategy with an organic grow.

If you want to buy feminized cannabis seeds, I recommend The Nirvana Seed Bank

How to Feminize Seeds

It’s important to learn how to feminize seeds so you can save time on your grow. When the traditional fertilization methods are used to grow your marijuana plants, you have less control over the gender of future marijuana plants.

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That is why many marijuana growers take extra steps so you receive female marijuana plants at the time of harvesting. To do it yourself, feminize seeds prior to your harvest.

What are Feminized Cannabis Seeds?

Feminized cannabis seeds produce only cannabinoid- and trichome-rich flower buds on female cannabis plants. Cannabinoids and terpenes are responsible for the potency, aroma, and flavor of cannabis.

A crop that uses high-quality feminized seeds will produce a female-only crop without the presence of male plants, which can pollinate your crop and potentially reduce your yield.

Another type of seed, a regular seed, is a result of natural pollination and breeding male and female seeds together. Cannabis growers working with regular seeds have a 50% chance of either yielding a female or male marijuana plant. Growing from regular seeds isn’t the best option if you’re looking to strictly grow cannabis buds. While male plants serve their specific purpose to pollinate females, they don’t produce the trichome covered flowers that female plants do.

How Are Feminized Seeds Made?

Feminized cannabis seeds serve a major purpose for commercial and home growers. Feminized seeds can be made by inducing a regular female cannabis plant to grow male sex organs that contain pollen. The hermaphroditic pollen will contain only the female X chromosome and no male Y chromosomes.

When used to pollinate a female cannabis plant, the seeds produced between the two plants will inherit two X chromosomes meaning that all subsequent seeds will be feminized.

The Benefits of Growing Feminized Seeds

Growing feminized cannabis seeds has many benefits over regular seeds. For one, growers don’t have to hedge their bets hoping that the regular seeds will produce female plants. Instead of planting more regular strains than needed to get lucky and get enough females for your specific purpose, you can stick with a sure bet using feminized strains. Using feminized seeds can speed up the growing process by eliminating the need to watch out for male plants, saving you time and space.

Male plants run the risk of pollinating female plants causing them to develop hermaphroditic structures and, ultimately, lower your plants’ yield compared to a grow without male plants. Weeding out the male plants, however, takes time and energy. Male plants display their sexual organs when the photoperiod changes naturally or when indoor lighting environments change.

Growers that don’t want to spend the time monitoring the plant every day can use feminized seeds to ensure that their garden will grow flower buds. Otherwise, growers will have to keep their eyes peeled for male plants and remove them from the grow immediately.

Male vs Female Marijuana Plants

Generally speaking, there is no way that you can determine the difference between male and female marijuana seeds in the initial stages of planting. In addition, you are also not able to change the gender of your marijuana deeds. The concept of having feminized marijuana seeds is to maximize the female seeds that will be part of your marijuana crop. Why would you want female marijuana plants? Well, these are known to have a higher level of THC content. Male plants have reduced THC content and for that reason, female plants take precedence over male plants. With cannabis seed feminization, there are several pollination techniques that the marijuana grower can use for a favorable outcome.

Buying the Right Cannabis Seeds

Female marijuana seeds are sold by various companies. So, you don’t have to wait to get your own. You can use the ones available to you and by doing so, you will be sure that your outcome is a female marijuana plant with more THC content. Be careful when buying marijuana seeds from companies online. Make sure this is a reputable company known for selling and delivering the right female marijuana seeds.

Learn How To Grow Cannabis!

Some “feminized” seeds may produce hermaphrodite plants if the seeds are of low quality. High-quality feminized cannabis seeds from reputable seed banks have been bred to not display hermaphroditic characteristics under optimal growing conditions. If you’re looking for a sure thing, carefully consider your cannabis seed source.

Alternative Methods to Feminizing Weed Plants

If you are going to do the feminization of marijuana seeds yourself, then there are methods that you can use namely:

  • Colloidal Silver
  • Silver Thiosulfate Solution
  • Rodelization

Each of these methods should be successful, if used in the right way to produce female marijuana plants. Let’s quickly look at each method briefly.

Pollinating Cannabis Plants

One of the simplest ways to produce feminized cannabis seed is to pollinate your plants yourself. Some cannabis strains can produce male flowers when the colas have reached late ripeness. Side note: Ed Rosenthal, master grower and proud member of the CTU faculty, prefers to harvest plants around this time. Harvest the pollen by using a clean and small painting brush to transfer the pollen into a metal or glass container or in small amounts directly on the flowers.

Some outdoor-friendly cannabis strains may become stressed when grown in indoor environments, which can increase the chance of producing hermaphrodite flowers. Indoor growing environments can stress plants with fluctuating light cycles and heat. Stress training techniques are difficult to pull off, even for experienced cannabis growers. If you do happen to spot a hermaphrodite with pollen, collect the pollen and save it for later use when you feel comfortable using it.

Using Chemicals To Feminize Seeds

Large-scale and home growers have harnessed the power of certain chemicals that can induce male flowers in female marijuana plants. These chemicals are used to hinder ethylene production. Ethylene is a plant hormone that helps cannabis plants ripen and produce female flowers. When ethylene production is stalled, female flowers aren’t produced. Keep in mind, these chemicals must be directly applied to each branch that you want male flowers to grow.

The Silver Thiosulfate Method

The Silver Thiosulfate Solution, also known as STS, is one of the most common methods of generating female marijuana seeds. It is very effective in allowing female marijuana seeds to be available to marijuana growers. Using this method will feminize the seeds in the best way possible, making more available on the market for growers. The solution is made of a combined silver nitrate and sodium thiosulfate. The solution result is a hormonal response to stress found in the marijuana plant. Because of this, gender change is triggered.

You can do all of this yourself, but the marijuana plants have to be wisely chosen. You should only take female plants from a single cannabis strain that is almost mature. Then you would separate the plant from the bunch and spray the plant with STS. Allow it to dry and then replace it, making sure it sits alongside the other plants in the bunch.

There are over 300,000 jobs in the cannabis industry. CTU trained me for one of them!