AgSil 16H Potassium Silicate by PQ Corporation — 20 lb Bucket
AgSil 16H is the professional standard for water-soluble potassium silicate supplementation in commercial agriculture, hydroponics, and greenhouse production. The 20 lb 3.5-gallon plastic bucket is ideal for mid-scale commercial operations, multi-site growers, and facilities that run silicon supplementation as a core part of their nutrient program. A hydrous potassium silicate powder with a 1.6 weight ratio (SiO₂:K₂O), AgSil 16H delivers 32% K₂O, 52.8% SiO₂, and 17.37% soluble silicon (AAPFCO approved method) — making it one of the most concentrated and analytically verified potassium silicate products available.
Compatible with fertigation, foliar, hydroponic, and soil applications across row crops, vine crops, ornamentals, turf, and greenhouse production.
Performance Benefits
- Mineral stress resistance — helps plants resist toxicity from phosphorus, manganese, aluminum, and iron
- Climate stress reduction — improves plant tolerance to environmental stress
- Drought tolerance — reduces water loss through improved cell wall strength; may increase growth and yield
- Salt tolerance — increases plant tolerance to elevated salt levels in the root zone
- Structural improvement — improves leaf erectness, reduces lodging in grasses, and improves photosynthesis efficiency
- Yield enhancement — documented yield increases across multiple crop types in peer-reviewed research
- Turf performance — faster, healthier greens and athletic fields through improved photosynthesis and structural integrity
Chemistry & Analysis
- Type: Hydrous potassium silicate powder
- Weight ratio: 1.6 (SiO₂ : K₂O)
- K₂O: 32%
- SiO₂: 52.8%
- H₂O: 14.8%
- Soluble Silicon: 17.37% (AAPFCO approved method, laboratory verified)
- Application rate: 0.7 g per gallon of water yields 98 ppm SiO₂ (46 ppm Si) and 49 ppm K
Application Notes
⚠️ Never mix concentrated silicon solutions with other concentrated fertilizers. Always dilute AgSil 16H separately before combining with other nutrients in your feed program.
Documents & References
| Growing System | Si ppm (SiO2) |
| NFT, DWC & other constantly recirculating hydroponics. | 3-6 ppm (7-12) |
| Drip systems, Ebb and Flo & other automatic fertigation systems. | 15-20 ppm Si (32-43ppm SiO2) |
| Weekly drenches in soilless or other low silicon soil/media systems. | 45-50 ppm Si (~100ppm SiO2) |
2% 200:1 | 1.28% 128:1 | 1% 100:1 | 7.8% 780:1 | |
| Grams of AgSIl 16H per liter of concentrate | 38g / L | 24.25g / L | 19g / L | 148g / L |
| Grams of AgSil 16H per gallon of concentrate | 144g / Gallon | 92g / Gallon | 72g / Gallon | 560g / Gallon |
| mL of concentrate to achieve 100 ppm SiO2 in one Liter final solution | 5mL / L | 7.8mL / L | 10mL / L | 1.28mL / L |
| mL of concentrate to achieve 100 ppm SiO2 in one Gallon final solution | 19mL / Gallon | 30mL / Gallon | 38mL / Gallon | 5mL / Gallon |
For foliar IPM application, we reccomend mixing AgSil 16H with Dyna-Gro Pure Neem Oil.
Mix 1.5 grams AgSil 16H with 1 ounce Dyna-Gro Pure Neem Oil to saponify the oil. Then mix this saponified oil with one gallon final volume spray solution. Spray every other week covering all plant surfaces (top and bottom of leaves) until it runs off.
AgSil 16H Potassium Silicate 20 lb
AgSil 16H Potassium Silicate 20 lb
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