m menu image  m home m cart



Acceptance Mark

Rootshield pluss

Nature's Source


triathalon BA

AgSil 16H Potassium silicate, 40 x 50 # bags, full pallet


Add to Cart:


  • Model: agsil16h full pallet, one ton
  • Shipping Weight: 2050lbs
  • Manufactured by: PQ Corporation


AgSil 16H,  full pallet of 40 x 50 pound bag.

Best Potassium Silicate Hydroponic fertilizer

AgSil® potassium silicate offers growers these performance benefits in many agricultural applications:

  •  Provides resistance to mineral stress.
  •  Decreases climate stress.
  •  Improves strength.
  •  Increases growth and yield.

AgSil® potassium silicate helps plants to resist toxicity from phosphorous, manganese, aluminum, and iron, and increases tolerance to salt 1. AgSil® potassium silicate also aids in resistance to drought by reducing water loss, and in some cases it may increase growth and yield 1-5.

Application of AgSil® potassium silicate improves leaf erectness, reduces susceptibility to lodging in grasses, and improves photosynthesis efficiency 1. For turf this can result in faster, healthier greens and athletic fields. Row crops, vine crops, ornamentals, and hydroponically grown plants can all benefit from potassium silicate supplementation.

This is a 1.6 weight ratio, hydrous potassium silicate powder with 32% K2O and 52.8% SiO2 and 14.8% H2O.



Silicon Hydroponic Application Rates
Growing System Si ppm (SiO2)
NFT, DWC & other constantly recirculating hydroponics.

3-6 ppm Si

(7-12ppm  SiO2)

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-less media systems.

45-50 ppm Si

(~100ppm SiO2)

To figure the grams of AgSil 16h needed per gallon to reach any target ppm SiO2 use this formula: 
To figure it at grams of AgSil 16h per Liter to reach any target ppm SiO2 use this following formula:

Concentrated stock solutions & dilution rates for 46.75ppm Si (100 ppm SiO2 ) in final nutrient solution

2% SiO2


1.28% SiO2


1% SiO2


7.8% SiO2


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 1.5-7 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. Combine this with a good non-ionic surfactant for best results. Spray every other week covering all plant surfaces (top and bottom of leaves) until it runs off.


  1.   Marschner, H., Mineral Nutrition of Higher Plants, Academic Press, 1995, pp. 417-426, 440-442.
  2.   Datnoff, L.E., et al., “Influence of Silicon Fertilizer Grades on Blast and Brown Spot Development and on Rice Yields,” Plant Disease, October 1992, pp. 1011-1013.
  3.   Miyake, Y. and E. Takahashi, “Effect of Silicon on the Growth of Cucumber Plant in Soil Culture,” Soil Sci. Plant Nutr., 29 (4), 1983, pp. 463-471.
  4.   Miyake, Y. and E. Takahashi, “Effect of Silicon on the Growth and Fruit Production of Strawberry Plants in a Solution Culture,” Soil Sci. Plant Nutr., 32 (2), 1986, pp. 321-326.
  5.  Miyake, Y. and E. Takahashi, “Silicon Deficiency of Tomato Plant,” Soil Sci. Plant Nutr., 24, 1978, pp. 175-189.
  6.  Schmidt, R.E., et al., “Response of Photosynthesis and Superoxide Dismutase to Silica Applied to Creeping   Bentgrass Grown Under Two Fertility Levels,” J. Plant Nutrition, 22 (11), 1999, pp. 1763-1773.
  7.  Posters presented at Silicon in Agriculture Conference, Sept. 26-30, 1999, Ft. Lauderdale, FL. “Effects of Silicon on the Seedling Growth of Creeping Bentgrass and Zoysiagrass,” by Z. Linjuan et al., China Agricultural University; “Influence of Silicon and Host Plant Resistance on Gray Leaf Spot Development in St. Augustinegrass,” by L.E. Datnoff and R.T. Nagata, University of Florida.
  8.  Chen, J., et al., “Let’s Put the Si Back into Soil,” University of Florida, Mid-Florida Research and Education Center, Apopka, FL.
  9. Sebastian et al. Journal of AOA C International Vol. 96, No. 2, 2013.pdf

AgSil 16H soluble silicon, plant available silicon analysis results

AgSil 16H soluble silicon, plant available silicon

AgSil 16H stock solution, soluble silicon analysis

560 grams AgSil 16H in one gallon of RO water




This product was added to our catalog on Monday 11 December, 2017.