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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.

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

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

BIOPHYSICA INCORPORATED Biomedical and Environmental Engineering Consultants
58 McAdam Avenue, Toronto, Ontario, Canada, M6A 1S7 Tel: 647-478-6946 or 1-800- 488-2032 E: Site:

President: Dr John Stewart

Disclaimer: Health Canada has not approved the use of colloidal silver for cannabis cultivation



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