Build Stronger Stems, Increase Pest Resistance & Maximise Plant Performance

Unlock the missing element in your grow with Growth Technology GT Silica—a premium potassium silicate additive designed to strengthen plant cell walls, improve stress resistance, and boost overall plant health.

Silicon is one of the most overlooked nutrients in hydroponics, yet it plays a critical role in producing stronger plants, thicker stems, and higher-yielding crops. GT Silica delivers the ideal 20ppm silicon concentration, helping your plants reach their full genetic potential.

The go-to choice for growers searching for the best silica for plants in Australia, potassium silicate hydroponics, or a proven plant stress resistance nutrient.

Why GT Silica Delivers Superior Results

Reinforces Cell Walls — Acts like internal armour, building thicker stems and preventing bending under heavy yields.
Natural Pest & Disease Resistance — Strengthened plant tissue helps defend against mites, insects, and fungal issues like powdery mildew.
Heat & Drought Protection — Reduces water loss and improves tolerance to high temperatures, ideal for harsh Australian conditions.
Boosts Nutrient Transport — Improves vascular strength, helping plants move water and nutrients more efficiently.
Essential Missing-Link Nutrient — Not included in most base nutrients—adding silica unlocks higher performance and resilience.

Performance Benefits: Grow Hardier, Faster, Higher-Yielding Plants

GT Silica enhances plant structure from the inside out, delivering visible improvements across all growth stages.

Thicker stems and stronger branches
Reduced plant stress under heat or intense lighting
Improved resistance to pests and disease
Healthier leaves with better structure
Increased yield potential and plant longevity

Full Cycle Benefits: Veg & Bloom

Vegetative Stage

Builds strong structural framework
Prevents weak, stretchy growth
Supports aggressive canopy development

Flowering Stage

Supports heavy bud and fruit weight
Reduces risk of branch snapping
Maintains plant health under stress

The Science Behind Silica

In natural soil environments, plants absorb silicic acid from mineral breakdown. In hydroponics and coco systems, this is almost completely absent.

GT Silica restores this critical element by:

Depositing silica into cell walls
Increasing rigidity and structural integrity
Creating a physical barrier against environmental stress

The result: stronger, more resilient, higher-performing plants at every stage of the cycle.

Value for Money — One of the Highest ROI Additives in Hydroponics

Extremely low dosage (1ml per litre) = long-lasting bottle
Prevents costly plant damage and yield loss
Enhances effectiveness of your entire nutrient program
Small investment → major performance upgrade

How to Use GT Silica

Dosage: 1ml per litre (delivers ~20ppm silicon)

Mixing Order (Critical): Always add silica to water first, mix thoroughly, then add nutrients

Suitable For: Hydroponics (DWC, NFT, drip) · Coco Coir · Soil

Frequency: Run-to-waste: every feed · Recirculating: weekly top-up

Pro Tip: Silica raises pH—always check and adjust after mixing for optimal nutrient uptake.

Safety & Handling

Highly alkaline concentrate—handle with care
Wear gloves and eye protection when handling
Store in a cool, dark place away from children

Perfect For

Hydroponic growers and indoor grow tents
Coco coir systems
Growers dealing with weak stems or heat stress
Anyone searching for the best silica for plants Australia, potassium silicate hydroponics, or a plant strength and pest resistance additive

Frequently Asked Questions

How do I add Growth Technology GT Silica to my feeding program?

Add Growth Technology GT Silica to your nutrient solution after mixing your base nutrient. Always add additives to water rather than directly to concentrated nutrient solutions. Stir well after each addition and check EC and pH before use. Start at the lower end of the recommended dose range and increase progressively — additives are potent and more is not always better.

Is Growth Technology GT Silica compatible with organic and mineral nutrient programs?

Growth Technology GT Silica is compatible with most hydroponic nutrient programs including both mineral and organic-based systems. If running a fully organic or biological program, check the formulation — some mineral additives can inhibit beneficial microbial populations. When in doubt, contact us at hello@apexgrow.com.au for compatibility advice specific to your setup.

Can I use Growth Technology GT Silica in soil, coco, and hydro?

Yes — Growth Technology GT Silica is suitable for use across all growing mediums including soil, coco coir, perlite, rockwool, and all recirculating and run-to-waste hydroponic systems. Dose rates may vary slightly between growing systems — always follow the manufacturer's feeding chart for your specific medium.

Does Growth Technology GT Silica ship fast within Australia?

Yes — Growth Technology GT Silica ships from our Australian warehouse with fast tracked delivery Australia-wide. Most east coast orders arrive within 2–5 business days. WA, NT, and TAS orders typically arrive within 5–12 business days.