• Pro Powders Silica Potassium Silicate 50lb
  • Description
  • Product Features
  • Specifications
  • Application Rates

Pro Powders Silica Pro™ Potassium Silicate

Silica Pro™ is a high-purity potassium silicate powder formulated to supplement crops with soluble potassium (K₂O) and plant-available silicon (Si). Silicon strengthens cell walls, supports upright growth, and improves tolerance to environmental stress including heat, drought, salinity, and fungal pressure.

Key Features

  • High-purity potassium silicate — fully water-soluble powder
  • Delivers both plant-available silicon (Si) and potassium (K₂O)
  • Strengthens cell walls — improves resistance to fungal pathogens and insects
  • Enhances tolerance to heat, drought, and salinity stress
  • Suitable for hydroponics, soilless media, and traditional soil cultivation
  • Raises solution pH — add to water before other nutrients

Ideal Applications

  • Hydroponic nutrient solutions
  • Fertigation: drip, micro-jet, sprinklers
  • Foliar spray programs
  • High-stress crop environments

Packaging Options

  • 1 lb
  • 3 lb
  • 20 lb
  • 50 lb

Technical Documentation

  • High Analysis: Silica Pro is a 1.6 weight ratio (SiO2 : K2O), hydrous potassium silicate powder with 33% K2O and 53% SiO2
  • Water Soluble: 100% bioavailable source of silicic acid for plant uptake.
  • Pure: Low in sodium, chloride and heavy metals.

Guaranteed Analysis


Soluble Potash (K2O).........................33.0%

Also Contains Non-Plant Food Ingredient:

Soluble Silica (SiO2).........................53.0%


Derived From: Potassium Silicate

Application Rates

GENERAL FEEDING (Continuous Program)
0.25 g per gallon of nutrient solution — suitable for all continuous fertigation and hydroponic programs.

NFT, DWC & Recirculating Hydroponics
Target: 3–6 ppm Si (7–12 ppm SiO₂)
Rate: ~0.04–0.08 g per gallon

Drip, Ebb & Flow & Auto-Fertigation Systems
Target: 15–20 ppm Si (32–43 ppm SiO₂)
Rate: ~0.20–0.27 g per gallon

Weekly Drench (Soilless / Low-Silicon Media)
Target: 45–50 ppm Si (~100 ppm SiO₂)
Rate: ~0.67 g per gallon

FOLIAR - Foliar application of potassium silicate is effective as a direct-contact pest and disease management tool. When applied to plant surfaces, silicon exerts a desiccation action on soft-bodied insects and fungal pathogens such as powdery mildew. Note: foliar silicon is not readily absorbed through leaf tissue and does not contribute to systemic plant uptake — root application via fertigation, drench, or top watering is required for plants to benefit from silicon's structural and stress-tolerance effects.
Foliar IPM Rate: Mix 1.5 g Silica Pro with 1 oz Dyna-Gro Pure Neem Oil to saponify, then bring to 1 gallon final volume. Apply every other week, spray to runoff covering all plant surfaces.

FERTIGATION - Delivered through an irrigation system, fertigation feeds plants while you water. This method ensures even distribution of nutrients directly to the root zone, making it efficient for larger gardens or automated systems.

SOIL DRENCH - Pour the diluted solution around the base of the plant to soak into the root zone. This deep-feeding method nourishes roots directly and is ideal for systemic nutrient uptake and long-term plant health.

TOP WATERING - Apply the solution manually over the soil surface with a watering can or hose. As water moves downward, nutrients are carried through the root zone, making this an easy, effective feeding method for container or in-ground plants.

CONCENTRATED STOCK SOLUTIONS (for ~43 ppm SiO₂ / 20 ppm Si in final solution)
2% stock (200:1): 16.3 g/L | 61.9 g/gal → dilute at 2.15 mL/L | 8.1 mL/gal
1.28% stock (128:1): 10.4 g/L | 39.5 g/gal → dilute at 3.35 mL/L | 12.7 mL/gal
1% stock (100:1): 8.2 g/L | 31 g/gal → dilute at 4.3 mL/L | 16.3 mL/gal
7.8% stock (780:1): 63.6 g/L | 241 g/gal → dilute at 0.55 mL/L | 2.1 mL/gal

Stock Solution Prep Note: Use distilled/deionized water. Raise pH above 11.3 with potassium hydroxide before dissolving powder. Keep covered, do not aerate. (Fatzinger & Bugbee, 2021)

Pro Powders Silica Pro Potassium Silicate

Pro Powders Silica Pro Potassium Silicate

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Auto-renews, skip or cancel anytime. View subscription policy

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solutions tailored for the unique needs of hydroponic and organic farming practices.

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