GH Armor Si 2.5 Gallon (Case of 2)

Potassium Silicate Supplement for Structural Strength and Stress Tolerance, 2.5 Gallon

Plant structure and stress tolerance depend partly on cell wall strength, and a standard base nutrient program doesn't typically supply silicon to support that structure. General Hydroponics Armor Si is a 0-0-4 potassium silicate supplement formulated to strengthen plant structure and help plants tolerate heat, cold, and other abiotic stress when layered onto an existing feeding program.

The 2.5 gallon jug, packed as a case of 2, fits regular indoor growers running a full feeding program who want structural and stress-tolerance support without stepping up to a 6 gallon container.

Key Features & Benefits

• 0-0-4 potassium silicate formula — supplies soluble silicon and potassium as a supplement layered onto a base nutrient program.
• Supports plant structure — designed to reinforce stems and foliage across all stages of growth.
• Helps improve tolerance to environmental stress — manufacturer-stated support for plants dealing with heat, cold, and other abiotic stress.
• Compatible with hydroponic, coco coir, and other mediums — mixes into an existing irrigation or feeding program across common growing media.

Who Should Use Armor Si

This fits growers already running a base nutrient program who want added structural support and stress tolerance, from seedlings through mature plants in hydroponic, coco coir, or other growing media. It's layered onto an existing feeding program rather than used as a standalone fertilizer.

About General Hydroponics Armor Si

General Hydroponics Armor Si is a 0-0-4 potassium silicate supplement designed to strengthen plant structure and help improve tolerance to environmental stress when added to an existing nutrient program.

Frequently Asked Questions

What does Armor Si's 0-0-4 analysis mean?

It's a guaranteed analysis of 0% nitrogen, 0% available phosphate, and 4% soluble potash, delivered through a potassium silicate formulation. The absence of nitrogen and phosphorus reflects its role as a silicon supplement rather than a primary fertilizer.

Do I still need my regular base nutrients?

Yes — Armor Si is a supplement, not a standalone or complete fertilizer. Add it to irrigation water or an existing feeding program according to label directions.

Does Armor Si actually help with heat and cold stress?

General Hydroponics states that Armor Si helps improve tolerance to environmental stress and supports plants during heat, cold, and other abiotic stress. That's the manufacturer's own claim for the product rather than an independently verified yield outcome.

When during the growth cycle can I use Armor Si?

It's formulated for use across all stages of growth, from seedlings through mature, flowering plants. Follow label directions for the recommended application rate at each stage.

Will Armor Si affect the pH of my nutrient solution?

Potassium silicate products can raise solution pH, so check and adjust pH after adding Armor Si to a reservoir. Follow label mixing order guidance to avoid precipitation with other nutrient components.