OGS AGSIL Potassium Silicate

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What is it?

OGS  Potassium Silicate is designed to be used as a foliar feed or wetting agent (in small amounts). Additionally AgSil has shown effective results against foreign invaders (mites, thrips, aphids etc)


Silica is an important macro-molecule used in the re-enforcement and fortification of cell walls.

As a result, plants grown with Silica will have leaves that are darker green, increasing their potential for photosynthesis and better growth. Silica invigorates yours plants and bolsters their resilience to pests and pathogens, leading to healthier plants and bigger yields.

Once Silica has been taken up by plant leaves, it is permanently deposited into the cell walls within 24 hours. The deposits form a silica-cellulose framework which can be created rapidly, effectively reinforcing the cell walls of your plants; These stronger cell walls help to shield your plants and make them more resilient towards infestations by sucking insects (white flies, aphids, etc).

In addition, plants will transport and deposit any Silica it uptakes to the area of a pathogen attack (powdery mildew, pythium, etc), stimulating the production of anti-fungal compounds that halt the infection process.

Silica also helps to balance the uptake of elements, competing against certain metals that are essential but can be problematic in excess such as Aluminium, Manganese, and Iron; As well as increases the fertility of pollen to ensure successful breeding and healthy progeny. 


Potassium is essential for the development of flowering plants. It also increases your plants ability to uptake and utilize CO2, which is critical for all stages of growth.

How do I use it?

Note: Due to the alkalinity of this product it is advisable to buffer the pH with something acidic such as humic acid when using AgSil. 

AgSil must be Foliar Fed:

25 mL per 10 L water every 2 weeks or as required.


Spot-Spraying - 25 mL per 10 L water as required.

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Size Chart