Growth Technology (GT) Silica
GT Silicon: The Essential Hydroponic Nutrient for Stronger, Healthier Plants
Silicon is the second most abundant element in the Earth’s crust, found in most rocks. However, its availability in soil water is limited, with concentrations rarely exceeding 20 ppm—the recommended level for hydroponic nutrient solutions.
Strengthens Cell Walls: Enhances plant structure, improving resistance to water loss, fungal infections (like mildew), and pest attacks.
Boosts Stress Tolerance: Increases resilience against heat, drought, and environmental stressors.
What is GT Silicon?
GT Silicon is a highly concentrated blend of silicic acid and potassium hydroxide, commonly known as potassium silicate. This powerful formula fortifies plant cells, creating a protective barrier against external threats while promoting stronger stems and healthier growth.
How to Use GT Silicon:
- Dilution Rate: Add 1ml per litre of nutrient solution to achieve the optimal 20 ppm silicon concentration.
- Application:
– Run-to-waste systems: Add GT Silicon when preparing the nutrient solution.
– Recirculating systems: Dose weekly for consistent plant support. - pH Considerations: GT Silicon is highly alkaline—always check and adjust pH levels after adding it to your tank.
Handling & Safety Guidelines:
- Always wear gloves and eye protection
- Always store in a locked cupboard
- Keep away from children
- Dilute with water before adding to tank
- Safety data sheets are available
Why Choose GT Silicon?
Silicon is classified as a beneficial nutrient, not essential, but proven to enhance plant growth and resilience. Some experts even suggest that its absence in hydroponic solutions can cause plant stress.
Give your plants the reinforcement they need with GT Silicon—the ultimate hydroponic additive for stronger, healthier, and more resilient growth.
Limited Warranty: The manufacturer, distributor or retailer, make no warranty whether expressed or implied, concerning the use of this product other than for the purposes and in the manner indicated on this label. The manufacturer, distributor or retailer shall not be liable for any direct or sequential injury or damage resulting from the misuse and/or mishandling of this product.
Festive Season Delivery Notice
Our final hand deliveries will be made on 23 December 2025.
The cut-off date for all shipped orders is 15 December 2025.
Any purchases made after these dates will be held until 5 January 2026, when orders will be processed and dispatched.
Thank you for your understanding and support over the holiday season!
Sydney Hand Delivery
We personally deliver your plants across Sydney, Tuesday to Friday, from 7:00am to 6:00pm to ensure they arrive fresh and vibrant.
Delivery timeframe: 1 to 3 business days (excluding public holidays).
Same Day Delivery
Available Tuesday to Friday for orders over $120 placed before 12pm within 4 km.
Delivery by 5:00pm for a $20 fee.
Local Delivery (Within 2 km)
Free for orders over $60.
Not available for orders under $60.
Inner Sydney (Within 10 km)
Free delivery on orders $120+.
$30 delivery fee on orders below $120.
Sydney Delivery (Within 15 km)
Free delivery on orders $140+.
$40 delivery fee on orders below $140.
Sydney Metro Delivery (Within 25 km)
Free delivery on orders $500+.
$70 delivery fee on orders below $500.
Free delivery thresholds apply to the total after discounts.
If you're not home, we’ll leave your order in a safe place if possible. Otherwise, it will be returned to our Newtown studio for collection or redelivery (fee applies). Please provide any delivery instructions for our drivers to help keep your plants safe.
National Courier Shipping
We ship across most of Australia with AusPost and Sendle, excluding NT, WA and TAS due to quarantine restrictions.
Free shipping on orders over $120 (after discounts), capped at $25.
No express shipping available.
Orders ship Monday to Wednesday to reduce transit time; weekend orders ship Monday.
Some items may be unavailable for shipping due to size or fragility — this will be indicated on the product page.
Shipment typically occurs within 2–4 business days after your order is placed.
Delivery timelines are determined by the courier partner.
Important Information
Customers are responsible for understanding this policy before ordering.
We cannot guarantee delivery times due to courier delays beyond our control.
Shipping fees are non-refundable; claims will be reviewed by courier partners.
If delivery instructions or permission to leave parcels are not provided, your order may be returned and redelivery fees will apply.
You will receive a confirmation email after placing your order. If you do not, please contact us at hello@plantdaddy.com.au.
Thank you for supporting Plant Daddy — we look forward to helping you grow your indoor garden!
The Plant Daddy journey began as a single Philodendron Rojo Congo in an up-cycled pot and has taken us from Newtown Markets to Manly, Moore Park and Summer Hill.
In 2020 our first store opened in Newtown just steps away from where it all started! We're located on Australia Street surrounded by some amazing food and drinks spots and other quirky stores all run by locals for locals!
The studio is an enchanting haven where your indoor botanical fantasies come alive, as we constantly refresh and replenish our sanctuary with the latest seasonal plant trends, elegant styling decor, and nurturing guidance to ensure your plants flourish
Our goal is to provide our customers with an ever-changing selection of beautiful, hand-selected indoor plants, accessories, styling and plant care with our warm and knowledgeable advice.
Our customers and community are at the core of what we do and we're here to help you bring the outdoors in.
24th September 2020
Pictured (L) Trent (R) Charlie
The Plant Daddies standing in the door of the home of Plant Daddy