colloidal silver marijuana

Colloidal Silver for Cannabis

The information in this page is applicable to many areas of agriculture as well.

Biophysica has been manufacturing colloidal mineral ionizers (generators) for over 20 years. Our colloidal generators use large area electrodes of solid silver making the highest quality and quantity of colloidal silver and other metals for biological applications, including intravenous use in hospitals.

Recently there has been an explosion of interest in colloidal silver for the cultivation of Cannabis. We are now the World’s leading manufacturer of commercial colloidal generators for agricultural spraying and also for fish farms, poultry farms, aquariums, swimming pools, cooling towers

Importance of Silver in Agriculture:
A Google search reveals almost 500,000 references to the agricultural benefits of electrically activated silver. Colloidal silver is being used to stimulate growth and to protect fruit trees, plants, beans, vegetables. One of our customers in Panama is spraying his Arabica coffee plants against Coffee Rust fungus and Pseudomonas while another in Florida spraying orange trees. It seems that plants (even cut flowers) have an immune system that responds dramatically to electrically activated silver atoms.

Adding colloidal silver and other essential minerals like zinc, magnesium, copper to the soil, is a way of boosting its nutrient content. Unlike pesticides and chemical fertilizers, colloidal silver does not evaporate, leaves no residues and keeps garden plants safe to eat. It kills bacteria, viruses and other pathogens that attack plants, and it also eliminates parasites. A small amount of colloidal silver used in spray application for plants (fruits and vegetables included) has been confirmed as safe for human consumption.

Colloidal Silver is a tasteless, odourless, non-toxic, pure, natural substance consisting of sub-microscopic clusters of silver atoms, suspended in water by a tiny electric charge on each particle. The molecule’s size usually ranges from 0.01 to about 0.001 micron in diameter (10 to 1 nanometers). The particles do not settle but remain suspended since the electric charge (Zeta Potential) exerts more force than gravity on each particle. Colloidal is the most bioavailable form of choice since all biological fluids are colloidal and must convert a crystalline salt solution to colloidal before it can be used. Taking our daily trace requirement of 0.5 mg is a powerful adjunct to our immune systems, by killing harmful disease-causing organisms, aids healing and has been confirmed to aid in the treatment of Cancer and Alzheimer’s.

Importance of Quality:

Quality and effectiveness of a colloid is defined as smallest diameter of silver atoms and molecules (nanoparticles) combined with electrical charge (Zeta Potential).

Most store bought Colloidal Silver is of poor quality and effectiveness for several important reasons discussed at and at

Accordingly, plant cultivators should buy their own professional Biophysica multi-channel commercial colloidal generator for large volume production. Our generator will also produce colloidal waters of 12 other essential minerals, such as zinc, copper, magnesium, iron.

Silver Science:
Minerals in the electrolyte ionic inorganic form, such as silver nitrate, are generally caustic and difficult to absorb. The colloidal form is not ionic, does not interact chemically and has long-lasting effectiveness. The presence of liquid Colloidal Silver has benefits for humans by disabling the oxygen metabolism enzyme of a virus, fungus, bacterium or any other single celled pathogen. Within a few minutes, the pathogen suffocates and dies, and is cleared out of the body by the immune, lymphatic and elimination systems. One of the primary Colloidal Silver benefits is that unlike pharmaceutical antibiotics that destroy beneficial enzymes, Colloidal Silver leaves these tissue-cell enzymes intact, as they are radically different from the enzymes of primitive single-celled life. Thus Colloidal Silver is absolutely safe for humans, animals, plants and all multi-celled living matter.

Colloidal silver has been used in horticulture as an ethylene inhibitor. Because it competes to bind to sites on the ethylene receptors of plants, solutions with silver particles are used by florists to maintain flower freshness. Horticulturists also may use colloidal silver to treat topical fungal infections on plants. When fruits and vegetables are grown on chemical fertilizers, we may not receive the necessary quantity of vitamins, minerals and trace elements which occur naturally. This may result in a decreased immune function over time. Dr. Robert Backer has also found a positive correlation between low silver levels and sickness. Some Biochemists suspect that a silver deficiency is possibly one of the main reasons cancer exists and is increasing at such a rapid rate today. Dr. Bjorn Nordstrom of the Karolinska Institute, Sweden, has used silver in his cancer treatment for many years. He says it has brought on rapid remission in many patients whom other doctors had given up on.

How to use Colloidal Silver:
Soaking seeds in colloidal silver before planting, increases germination and reduces mold growth in sprouts. In addition, small amounts of colloidal silver diluted with pure water can be sprayed on soil. The plant may absorb the microscopic silver particles and become more resistant to soil-based pathogens. Treating soil around younger plant roots allows them to grow more vigorously.

Cut Plants and Flowers:
Adding colloidal silver to cut plants allows the plant to live longer and prevents it from falling victim to bacteria, viruses and fungi. Plants placed in water with colloidal silver added to it wither and die less than those placed in normal water which may contain bacteria and pathogens. Spraying a small amount of colloidal silver onto the stem and leaf surfaces, allows the plant to absorb silver ions and prevent fungi, viruses and bacteria from colonizing the outer surface. The colloidal silver is absorbed into the plant and as a result, kills any pathogens inside itself as well as any embedded insect eggs. However, colloidal silver does not affect mature insects, therefore pollinators such as bees and ladybugs are not harmed.

In our experience, adding colloidal silver to plants and sprouts has decreased the growing time for maturation. These plants and sprouts also grow to be significantly bigger than those untreated with colloidal silver.

Cut flowers remain fully alive for many days. Colloidal silver can be used to greatly extend the time before decaying begins on cut flowers. Probably due to the bacteria and other pathogens in water, cut flowers placed that medium will tend to wither and die much more quickly than cut flowers that are placed in water which has colloidal silver added to it. The colloidal silver not only kills the pathogens in the water but is subsequently absorbed into the flowers and taken to the cellular level where colloidal silver works internally to kill remaining pathogens and to stimulate the plant’s immune system.

20% of California marijuana products failing tests for potency and purity, Friday, September 14, 2018 Testing companies licensed by the state are finding unacceptable levels of pesticides, solvents and bacteria, including E. coli and salmonella.

Coffee rust is a disease with the power to cripple, or even wipe out, the country’s national product,

Nano-silver as a potential biostimulant for plants – A review
by Andżelika Byczyńska Department of Horticulture, Faculty of Environmental Management and Agriculture, West Pomeranian University of Technology, Szczecin, Poland World Scientific News 86(3) (2017) 180-192

Nanotechnology, as one of the most promising fields of science, brings unlimited possibilities of development of many areas, including agriculture and horticulture. Nano-silver is one of the nanomaterials that its effect on plants are under investigation nowadays. Numerous experiments conducted by scientists evaluated the possibility of using nano-silver as a potential plant growth regulator for crops, and also as a means to extend the post-harvest longevity of cut flowers and ornamental foliage. This paper summarizes a comprehensive and systematic study of the data on nanosilver activity and its application in horticulture, postharvest handling and storage of cut flowers and florist greens.

Effect Of Nano–Silver On Crops
This extensive review gathers information on nano-silver provided by recent research, especially when is used in horticulture. Applications of nano-silver resulted in an increase in plant height, leaf number, root weight, biomass of plant , seed germination, seed yield, quality of fruit, stem length, diameter of canopy area, root length, growth and development of explants under in vitro culture condition and number of protoplasts. The addition of an appropriate nano-silver concentration increased chlorophylls content, carotenoids, flavonoids, photosynthetic quantum efficiency, enzymatic activity, content of parahydroxy benzoic acid, α-terpinyl acetate, as well as antioxidative enzymes activities. Experimental results on the use of nano-silver in crops are summarized in a Table.

Gardeners: Colloidal Silver Kills Plant Fungus, Produces Larger and Healthier Crops:

A solution of 10 ppm strength colloidal silver mixed at the rate of 1 pint colloidal silver to 2.5 gallons of water and 1/4 teaspoon household detergent was applied to affected trees (in various states of challenge, from 10% to 50% foliage involvement). Visually detectable improvement manifested within 48 hours. Marked improvement and pathogenic stabilization evidenced within 72 hours. New leaf growth started to appear within 7 days.

The Effect of Nano-Silver Liquid against the White Rot of the Green Onion Caused by Sclerotium cepivorum:
Nanosilver-treated green onion plants, once harvested, were demonstrated to have grown larger and to weigh more than the non-treated green onion plants.

In this breakthrough study, published in the March 2010 issue of the journal Mycobiology, researchers found that applying varying levels of silver nanoparticles to the roots of green onion plants completely eradicated Sclerotium cepivorum fungal infections known to destroy the plants.

Not only did the application of silver nanoparticles destroy the pathogenic plant fungus, but according to the study authors, it caused no harm whatsoever to beneficial soil microbes needed by the green onion plants for growth, nor was there any negative change in the soil chemistry or composition. What’s more, the nanosilver-treated green onion plants, once harvested, were demonstrated to have grown larger and to weigh more than the non-treated green onion plants. Finally, the study researchers pointed out that the more they increased the use of nanosilver on the green onion plants, the lower the level of silver being absorbed into the plant itself. The researchers stated, “When the amount of nano-silver was calculated in the plants grown in nano-silver treated soil, it was found that the concentration of nano-silver used for treatment and the concentration of nano-silver found in the plants was inversely proportional.” In other words, the plants themselves apparently reduce absorption of the nanosilver when higher levels are used on them to control the plant blight.

The conclusion drawn by the study researchers was staggering in its implications: “Nano-silver liquid for the prevention of various plant pathogenic fungi is highly recommended to farmers. Additionally, the use of nano-silver does not cause any harm to human beings, and it is safe for the environment and agricultural products. In conclusion, we can say that by using nano-silver liquid, environmental pollution and the excessive use of chemical compounds in the field can be reduced. It is expected that the application of nano-silver at low concentrations will be economic, eco friendly, and decrease farm management costs.”

New Study:
Silver Nanoparticles Do NOT Harm Environment. “The Impact of Silver Nanoparticles on the Composting of Municipal Solid Waste,” published in December 2013 in the journal Environmental Science & Technology, “the composting of municipal solid waste” and found that “…functional performance was not significantly affected…” when silver nanoparticles were added.

Marijuana Plants Show very Heavy Increase in Growth and Production with Live-Silver
“Experiments were made with tomatoes and medical marijuana. Both produced about six times the weight as well as the sinsenilla in the marijuana. The sinsenilla is the THC product growers really want,” says Mr. Marvin Lee Robey, of Live-Silver. “Plants were very healthy and tomatoes had excellent flavor.” Plants raised in soil also produced over five times the weight of control plants when the plant roots were watered with one cup of electrically charged silver when the plants were ten inches high; similar increased growth and production of green beans and peas. Tests are continuing. The strength of the electrical charge on the silver seems to be the controlling factor. The stronger the electrical charge the greater the growth.

How to Use Colloidal Silver to Produce Feminized Cannabis Seeds:
Silver is totally safe by ingestion or smoking. Use at 40 ppm and do not dilute with water which would neutralise the electrical charge (Zeta Potential).

Colloidal Silver & Cannabis
we use colloidal silver (CS) for making feminised seeds, which i’m a big fan of after having nothing but great success from them since i started growing a few years ago.

Making Your Own Feminized Marijuana Seeds
Feminized seeds are found to be the newest kind of Marijuana seeds. The secret for creating your own feminized seeds is the substance called colloidal silver.

How To Make Feminized Marijuana Seeds.
Spray them with silver water every day after they have reached their flowering stage, my free marijuana grow guide at this link for more growing tips.

A Guide To Colloidal Silver​ How does Colloidal Silver work on cannabis plants
How 420 became code for marijuana
Russian Report on CS:
Silver water is used successfully by gardeners and farmers in Russia to improve and preserve the harvest, increase immunity of plants to harmful microorganisms and extend the life of cut flowers.

CS soaking tubers and seeds before sowing:
Soaking in a silver water tubers and plant seeds before sowing increases the immunity of plants to pathogens and increases the germination of seeds. For the soaking of seeds and tubers, use the water of the same concentration as for soaking seeds for germination. Soaking is done for 2-3 hours.

Watering and spraying plants and seedlings:
When watering the plants with silver water, disinfection of the soil takes place against most microorganisms, mold, fungi. To use the irrigation water prepare as follows: use concentrated (30-50 ppm) silver water. Do not dilute CS water because unlike bulk water, the CS water is hexagonally structured and carries an electrical charge (Zeta Potential).

Safety of domestic preparations:
Silver ions inhibit microorganisms that cause fermentation and mold spores. Therefore, home-made, cooked in a silver water – pickles, jams, composts, etc. – Are kept much longer and do not lose their flavor.

Long-term preservation of cut flowers up to 2-3 weeks:
Silver water extends the life of cut flowers. Use cut flower water of the same concentration as for watering plants. Every day change the water on a freshly prepared.

The Best Colloidal Silver Generators:
Biophysica CS12A Colloidal Silver Generator: While advertised as a colloidal silver generator, the Biophysica CS12A machine is unique in its ability to produce 12 different types of metal colloids, By Brian Connolly Aug. 14, 2017

Dr. John Stewart on growing cannabis using nanotechnology

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© Biophysica Incorporated Disclaimer: Our electric and magnetic devices emit energies that are similar to established proven technologies, are designed to achieve equal results and may be helpful in similar situations. Our specific devices have not been subjected to external scientific studies and are custom built for personal use or experimental and research electro-physiological uses only.

Colloidal Silver for Cannabis The information in this page is applicable to many areas of agriculture as well. Synopsis: Biophysica has been manufacturing colloidal mineral ionizers

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

There are two main methods to create your own 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 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 your own 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 Seedsman who has a huge selection of feminized seeds.

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 at 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


  • 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


  • 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 definitely 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 ( for more information on 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.

The concentration of silver ions in the water actually act 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 for 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 off 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 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 actually 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 own 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)
  • Soldering Iron (Optional: only needed if you want to use alligator clips)

The diagram above will show you how to easily make your own colloidal silver to make your own 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)
  • making sure the solution has as little contact with light as possible until you use it

How to Make Feminized Cannabis Seeds Using Rodelization


  • All-Natural
  • Very Simple


  • 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. Basically, 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 in 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 which 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 for plants that have a natural genetic tendency to show male characteristics. This can possibly 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

There are two main methods to create your own feminized cannabis seeds: the colloidal silver spray method or using rodelization.