GT Silica: The Forgotten Element for Stronger Plants

Silica is often described as the forgotten element. It’s not classed as essential for all plants—yet when used correctly, it can deliver outsized benefits to plant strength and performance.

GT Silica is a powerful additive designed to improve plant health by supporting structure, photosynthesis, and stress tolerance.

What silica does (in practical terms)

Used correctly, silica can support:

• Stronger cell walls → better resistance to pests and fungal pressure
• Improved chlorophyll production → stronger photosynthesis performance
• Better CO₂ uptake → improved efficiency in growth processes
• Higher stress resistance → better performance under environmental swings

The net effect is a plant that can be more robust, more resilient, and easier to keep consistent.

Important: Silica is an additive, not a complete feed. Always run it alongside a complete nutrient solution, such as a Focus Range product (for example, Foliage Focus).

Dosing guide

• Hydroponic / semi-hydro: 5 ml per litre of water
• Potting mixes: 2–3 ml per litre of water

How to mix GT Silica (order matters)

Silica needs to be mixed correctly to avoid stability issues.

1. Add GT Silica to plain water
2. Stir thoroughly, then rest for 5 minutes
3. Add your nutrient solution
4. Stir thoroughly, then rest for 5 minutes

Silica is naturally alkaline, which means it can raise the pH of your solution.

That’s why pH testing is not optional if you want predictable results:

• If pH is too high, it can reduce nutrient availability
• Reduced availability makes it harder for plants to absorb the minerals you’re paying for

Aim for a practical working range of pH 5.5–6.5 (then adjust as needed using a pH-down product).

Fresh mixing only

Unlike many nutrients, silica doesn’t hold well once mixed.

• Mix fresh
• Use promptly
• Don’t store mixed silica solutions for later use

Prefer “no pH fuss”?

If pH adjusting feels like too much complexity, a ready-to-use foliar product that includes silica can be a simpler pathway—while still delivering some of the resilience benefits silica is known for.

Key takeaway: Silica can be a game changer—but only when it’s mixed in the right order and followed by pH testing.