Reviewed by Cleveland B.
Verified Buyer
I recommend this product
Great product
I use this product with great results
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BuildASoil | SKU:
AG110
Liquid Agsil - Potassium Silicate
Rated 5.0 out of 5
Regular price
$35.00
Unit price
Liquid Agsil - Potassium Silicate - Quart is backordered and will ship as soon as it is back in stock.
Quality First
Quality First
BuildASoil is committed to sourcing the highest quality ingredients you can trust. over 10,000 Five Star Reviews and over a decade in business
Delivery and Shipping
Delivery and Shipping
Shipping Policy
Shipping is expensive, and it gets more expensive almost every year. We are not going to pretend otherwise. What we can tell you is that we work hard to find the most reliable and affordable way to get your order to you, and we pass along free shipping wherever it makes sense.
Free shipping on any order with two or more items. The one exception is bulk items, meaning the large or heavy products that have to move by freight or oversized parcel. If your cart qualifies, free shipping is applied automatically at checkout.
Why two items and not a dollar amount?
Most stores set free shipping at a dollar threshold. That works when you sell light things like clothing. We don't. We ship soil, amendments, and heavy real goods that are expensive and awkward to move, so a dollar minimum doesn't reflect what shipping actually costs us.
We are a small business with no outside financial backing, and we are not Amazon. We manufacture, pack, and ship everything in house so we can control quality, which means real people picking, boxing, taping, and labeling every order, and that means real jobs. When we ship a single item for free, the only way to cover it is to raise prices across the board, and we would rather not do that. Asking for two or more items on free orders lets us keep prices lower for everyone and keep shipping sustainable. We hate high shipping costs as much as you do, and this is the fairest way we have found to keep them down.
Delivery estimates
Every product page shows an estimated delivery window based on current fulfillment and carrier schedules, so you know what to expect before you buy.
Shipping Options
BuildASoil Shipping
Free
Free on eligible orders with two or more items. We select the carrier and method.
Standard Shipping
Paid
Standard ground service.
Standard Shipping: Rushed Out the Door
Paid, slightly more
Same standard transit, but we push it out the door the same day when we can.
Get It Fast
Higher
Prioritized fulfillment with faster transit.
Overnight It
Highest
The fastest option we offer.
Pickup at Factory Store
Free
Bring your order confirmation and a valid ID.
FedEx Freight (Economy)
Quoted
For large or heavy orders.
FedEx Freight (Priority)
Quoted
For large or heavy orders, faster transit.
Carriers
We ship with FedEx, UPS, and USPS, and we pick the carrier that gets your order to you reliably at the best cost. We cannot guarantee a specific carrier unless you arrange it with us ahead of time.
PO Boxes
Orders to PO Boxes often cost more and usually do not qualify for free shipping. Use a physical address to avoid delays and added fees.
Outside the Continental US
We ship to Alaska, Hawaii, Puerto Rico, Guam, the Northern Mariana Islands, and the US Virgin Islands. Free shipping generally does not apply to large or bulky items going to these destinations, though Hawaii and Alaska have more flexibility depending on carrier policy. Rates are quoted at checkout or on request.
Canada
We ship select items to Canada. Canadian customers need to choose "UPS Standard Shipping to Canada" at checkout so your order clears customs cleanly and you avoid surprise brokerage fees. Orders placed with other methods can be delayed or rejected at the border.
Vendor-Fulfilled Items
Some products ship directly from our vendor partners and show their own estimated ship dates on the product page. Questions about these go to support@buildasoil.com.
Freight Shipments
Freight orders arrive on pallets by box truck or semi. We assume you need liftgate service unless you tell us otherwise.
Inspect every freight shipment before you sign. Count the packages and check for damage. Signing the delivery receipt confirms the order arrived complete and undamaged, so note any problem on the receipt before you sign it.
Full Truckloads
Full truckload (FTL) orders are custom quoted after checkout based on your location, order volume, and how the truck will be unloaded.
- Let us know if you have a dock, forklift, or other unloading equipment.
- Tell us if you need liftgate or manual unload service.
- Email support@buildasoil.com ahead of time for an FTL quote.
Order Tracking
We email tracking as soon as your order ships. If it does not arrive, check buildasoil.aftership.com with your order details, or email support@buildasoil.com.
Shipping Protection
This optional add-on at checkout covers your shipment against loss, theft, and damage, and we fast-track those claims for replacement or resolution. Even with protection, photos and documentation help us move carrier claims along faster.
Claims
Send all claims to support@buildasoil.com. We do not process claims by phone.
Include:
- A description of the issue
- Photos or video of the damage, or of missing or incorrect items
- Images of the packaging and labels
Hold onto the packaging and any damaged items until the claim is resolved, since carriers may require an inspection.
Claim deadlines
- Damage or missing items: within 60 days of delivery
- Incorrect products: within 60 days of shipment
- Lost or misdelivered packages: within 60 days of shipment
Once Your Order Leaves Our Facility
We help with every carrier claim we can. But once an order is in the carrier's hands, we cannot control delays, damage, or misdelivery, and the carrier makes the final call on claims.
Liquid Agsil - Potassium Silicate - Quart is backordered and will ship as soon as it is back in stock.
Description
Description
Liquid Potassium Silicate For Stronger Plants - Super Concentrate
Growing in living soil, coot originally taught us about foliar spraying with Potassium Silicate and it's become a go to for healthy plants that resist disease and have higher harvest weights. Besides that, coot taught us that potassium silicate can very effectively emulsify oils like Neem oil or essential oil for home made pesticide spray.
Liquid AgSil Potassium Silicate provides a highly available source of silicon and potassium that helps plants build strength from the inside out. Silicon supports cell structure, improves stress tolerance, and reinforces natural defenses, while potassium plays a key role in overall growth and metabolic function. This formula is designed to be safe for a wide range of crops, including sensitive varieties, with a low salt index that fits well into professional and home growing programs.
AgSil can be applied through soil or as a foliar spray, helping plants handle drought, temperature extremes, salinity, and mineral toxicity. It also supports the plant immune response, increasing resistance to common soil and foliar pressures. Many growers prefer liquid potassium silicate for ease of use, but this powdered form offers long shelf life, flexible mixing, and excellent value once properly dissolved.
Guaranteed Analysis
Silica (SiO2) 21 percent
Potassium (K2O) 8 percent
Derived from potassium silicate
Why Growers Use AgSil
Improves plant strength and structure
Supports stress tolerance from heat, cold, and drought
Enhances resistance to environmental and biological pressures
Low salt index and safe for sensitive crops
Instructions for Use:
BuildASoil recommends using (0.5 mL - 1.5ml) of AgSil 25 per gallon of water
Foliar spray your plants or water in.
Excellent for emulsifying oils for foliar spray
BuildASoil has offered the Agsil16H for over a decade and with high demand for a liquid version and unstable supply last year of the powder, we decided to bring in the Agsil Liquid. Some growers would complain the powder bricked up or they would accidentally use to much, the liquid is heavier to ship but easy to use.
Specifications
Specifications
-
Length (in)
-
Width (in)
-
Height (in)
Questions?
We are here to help and our entire staff knows how to grow. Just reach out via chat, email or even phone. We are passionate about growing and want you to succeed.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Based on 5 reviews
100%
of reviewers would recommend this product to a friend
Customer photos and videos
5 Reviews
Reviewed by William L.
Verified Buyer
I recommend this product
So Easy!
This product is so much easier to use than the powdered variety. You do need to ph after adding this to plain water (just to bring the ph down to a reasonable level). I'm using this only for foliar applications.
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Reviewed by Jose H.
Verified Buyer
I recommend this product
Silica
I use the stuff on everything🤪
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Reviewed by Jose
I recommend this product
5 Stars
Unmatched quality
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Reviewed by JEFFREY
Verified Reviewer
I recommend this product
Open editing position?
In your written web notes you mention-"... growers prefer liquid potassium silicate for ease of use, but this powdered form offers long shelf life, flexible mixing... does not match the context of the application notes.
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Rated 5.0 out of 5
