GT Super PK | Phosphorus & Potassium Bloom Booster for Hydroponics | 1L, 5.5L, 20L

More Weight, More Density, Better Quality — That’s What PK Does at Flower

GT Super PK is a concentrated phosphorus and potassium (P&K) bloom booster added to your nutrient solution during the flowering and fruiting stage. When your plants shift into flower, their demand for P&K surges — and most base nutrients alone can’t keep up. GT Super PK fills that gap, driving heavier, denser flowers with more flowering sites, better aroma, and improved flavour from harvest to harvest.

Why P&K Matters So Much at Flower

• 🌸 Phosphorus (P) — critical for cell multiplication, energy transfer (ATP), and cell membrane function. At flower, it drives bud initiation, development, and the structural integrity of every flower site
• 🌸 Potassium (K) — the second most demanded mineral nutrient after nitrogen. Controls water movement inside cells (osmoregulation), stress tolerance against pathogens and environmental factors, and the density and quality of finished flowers

What to Expect From GT Super PK

• ✅ Increased flower weight and density — more P&K at the right time means bigger, heavier buds and fruits
• ✅ More flowering sites — phosphorus supports the cell division that creates additional bud sites
• ✅ Better quality at harvest — improved sweetness, aroma, and flavour in fruiting and flowering crops
• ✅ Stronger pest and disease resistance — potassium builds plant resilience through the stress of late-stage flowering
• ✅ Works with any base nutrient — GT Coco, GT Optimum, or any other brand

How to Use GT Super PK

1. Add 1–3ml of GT Super PK per litre of nutrient solution. Do not exceed 5ml per litre
2. Mix thoroughly
3. Adjust pH to between 5.5 and 6.5
4. Continue adding Super PK throughout the flowering cycle

EC note: At 5ml/L, GT Super PK adds approximately 0.7 mS/cm to your EC. Consider reducing your base nutrient strength slightly at higher doses to stay within your target EC range.

Recirculating systems: Add GT Super PK once per week when refreshing your reservoir.

Run-to-waste systems: Add when preparing each fresh nutrient solution.

Tip: Introduce GT Super PK from the start of flowering and run it right through to flush for maximum effect on flower quality and weight.

Choose the Right Size

• 1L — ideal for home growers and small flowering systems
• 5.5L — great value for regular growers running multiple cycles per year
• 20L — best value for large-scale grows and commercial flowering operations

Stack it: Pair GT Super PK with GT Silica for stronger, more resilient flowers and GT Fulvic for enhanced nutrient uptake — a proven combination for elite results at harvest.

By Growth Technology — trusted by Australian hydroponic growers for decades.