General Hydroponics Armor Si: Potassium Silicate Supplement for Stronger Stems and Stress Tolerance
General Hydroponics Armor Si is a 0-0-4 silica supplement built around potassium silicate, which is the form of silica plants can actually put to work inside cell walls. Silicon gets deposited as opal phytoliths along cell walls, stem tissue, and leaf cuticles, and that structural reinforcement is what lets a plant hold heavier flower weight, shrug off piercing insects, and buffer against heat stress without wilting. The 4% potassium contribution also adds a useful bump to the feeding program. Armor Si runs at high pH when concentrated, around 11, which matters for mix sequence — it always goes into the reservoir first, before any acidic nutrients, so calcium doesn't lock out.
Compatible with GH Flora Series and Any Hydroponic or Soil Feeding Program
Armor Si drops into any base nutrient lineup. It was built to round out GH's Flora Series (FloraGro, FloraMicro, FloraBloom), but growers running CES, House & Garden, or even a dry salt program use it the same way. Dose rate is 1 tsp per gallon through veg and early bloom, stepping back in late bloom so the potassium doesn't unbalance the phosphorus-heavy finisher feed. Multiple sizes cover every scale from a hobby tent to a commercial facility: 1 pint for testing, 1 quart for a single room, 1 gallon for an established grower, 2.5 gallon for production, and 6 gallon for continuous-cycle commercial rooms.
Key Features
- Potassium Silicate 0-0-4: Bioavailable silicon form that deposits in cell walls and stem tissue for stronger structural support.
- Stress Tolerance Booster: Silicon deposition helps plants handle heat, drought, and mechanical stress without wilting or breakage.
- Add First in Mix Sequence: High pH concentrate must go into the reservoir before acidic nutrients to prevent calcium lockout.
- Universal Compatibility: Works with GH Flora Series, CES, House & Garden, and nearly any liquid or dry base nutrient program.
- Five Size Options: From 1 pint for trials up to 6 gallon for commercial flower rooms running continuous cycles.