Silica Powder

(15 customer reviews)


Stimulates proper cell structure and strengthens plant tissue for healthy, flourishing plants even in adverse environmental conditions such as heat, drought and frost.

Not Avail in California


Easy replacement for any Potassium Silicate product you can find on the market today.

Silicates used in standard liquid silica products are not plant friendly or plant available.

Substitute with a Natural and Organic Silica Powder to your Nutrient plan. Specifically designed to help your plant respond better to wilt, heat, stress and drought. At the same time Silica is developing your plants cellular walls increasing stem strength and overall health.

Our Silica Powder is not a potassium silicate powder product. Derived from Silicone Dioxide, a porous mineral rock which differs greatly from the potassium silicate powder.

Product form:

Dry powder, water flow-able

NPK analysis:


Product designation:


Well suited for:

Hydroponics, soil and soil-less.

Other product highlights:

Product composition: 65% silicon dioxide, 5% potash. Product is an organic silica and has a neutral pH.

Primary function/use:

Aids in creating strong cell walls, which results in strong stems. Improve resistance to wilt, heat, stress and drought.

When and where to use:

During all stages of plant development.

For hydroponics, soil and soil-less:

Mix ½ to one (1) tsp. with one (1) gallon of water.


Product will settle over time. Shake well before use.


Ensure bag is properly sealed and stored in cool, dry, dark place.

What to Expect:

Silica Powder makes it easy for your plants metabolism to function properly by balancing nutrient absorption during the vegetative stage to improve fruit and flower production during the bloom stage.

Plant structure is vital for holding the weight of fruits and flowers. Strengthen your plants cell walls, increasing the plants natural defense against disease, drought and pests.

Additional information

Weight N/A

15 reviews for Silica Powder

  1. Tim

    Definately gives a more robust, thicker stem and overall more vigorous growth. Very good product.

  2. Gina

    Great product, it saved my tomato from damage when the top of the plant bent over the cage it was in. Added 10 foot stakes and lifted it and to my amazement had minor damage. It could have been a real mess, but just a few minor cracks in the very top branches

  3. Frank

    Great addition to any soil built from the ground up. Used a cycle back finding that my plants stalks and stems were much stronger and larger than normal. I’ve also noticed that less fruit dropped and flowers just seemed healthier. I’d imagine that a larger stem system basically allowed water and Nutrient to flow more productive. Great product

  4. Aaron

    You want nice strong leaves, stems, and roots, get yourself some of this! I’d say, it’s only been 3 months, but I can tell in my hand-sized leaves that this silica is doing something great to my grow. Great price, ships wicked fast. Return customer right here!!

  5. Ryan

    Great product. Works well. This is a very beneficial additive.
    It is not soluble, however. I could not use it in my aeroponic system, but it is a great additive for soil or certain hydroponic systems, especially since there is typically no silica in soil-less method.

  6. Dane Theisen

    Silica powder from Kelp4Less is an excellent addition to your indoor or outdoor garden. It has made my plants more resistant to powdery mild, high heat and high stress conditions ; giving them the defense and insurance they need to create bigger, denser bud sites .Not to mention my stalks are harder and more sturdy. Now I don’t have to tie some of my plants up on bamboo stalks during week 5-10 of flower. This product works just as good as RAW Silica or higher priced designer products like Rhino Skin by Advanced Nutrients. Don’t pay for water, add Kelp4Less Silica powder to your gardening mix.

  7. Chris

    I have a very very high temperature for my grow area which is beyond my control, and this product helps my plants to withstand the stress much better. Also I have not experienced any clouding that I have read of people experiencing with other silica products on the market.

  8. Jason

    First year using silica powder and I am extremely happy. Plants withstand wind better, I live in hot, humid conditions and plants respond well. No wilting! I am very happy and will order again.

  9. SpitFire

    I first used this and was pretty impressed!! I think I do great organic gardening already, but this really makes a difference. I mainly use it a preventive maintenance. Disease, pests or shock will be almost extinct if used on a regular basis. Your plants get strong when this is used. Also as a stand alone foliar spray makes leaves strong and tough!! Liquid armor is what I call it.. I’m very excited that they offer this in powdered form. Great stuff indoors and as foliar feeds.. K4L has done it again with this hit!! Thanx

  10. JasonTramonto

    Everything I feed this to is more rubbery, sturdy, and stable. I feed about 1/4 to 1/2 tsp per gallon of root drench about every other week. Looking forward to combining this with the bloom pack on my tomatoes this summer.

  11. Nate E

    Silica from Kelp4Less is a must! It helps for thicker, sturdier stalks and stems, and also helps with preventive maintenance (resistance to powdery milder and some sucking insects). It dissolves well in water and my plants have no issues with up-taking this type of silica from Kelp4Less. Not to mention, they have a good price when buying in bulk.

  12. jshep (verified owner)

    I have seen improvement but my only complaint is that is does not dissolve completely so I am not confident my plants are receiving the full benefit they could be.

  13. chinesemedicineman (verified owner)

    Great product. I have 2 dutch bucket systems. I added 1/2 teaspoon to each of my dutch buckets in one of the systems. One benefit I wasn’t expecting is outrageous lateral branching. It was easy to see the difference it made.

  14. Jim Ford (verified owner)

    One of several products I used to help me grow a 2177# Giant Pumpkin.
    Giant Pumpkins Have huge leaves that can get shattered in high wind.
    This product sturdies up leaves and leaf axils!

  15. Jim Ford (verified owner)

    One of several products I used to help me grow a 2177# Giant Pumpkin. Giant Pumpkins have huge leaves that can shatter in high wind. This silica product sturdies up leaves and leaf axils!

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