Gold Label Ultra PK
Gold Label Ultra PK
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Order by 3pm Mon–Thu for next-working-day delivery · FREE delivery over £50 · Free Wembley pickup
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Description
Keep phosphorus available and drip lines clean
Gold Label Ultra PK is a flowering additive built on advanced polyphosphates and chelated trace elements, developed to balance NPK and micro-element availability through both vegetative and generative development. It solves a common grower problem: at higher pH, phosphorus deposits out of solution, blocking drip lines and locking away nutrients your plants need to bulk their flowers.
Key Benefits
- Advanced polyphosphates stay in solution rather than precipitating out.
- Prevents phosphorus deposition above pH 6.2, keeping P available when hard water pushes pH up.
- Chelated trace elements for reliable uptake even in demanding recirculating systems.
- Promotes calcium, magnesium and trace element availability for balanced feeding.
- Keeps drip lines and emitters clean by avoiding mineral build-up.
Blocked emitters and locked-up phosphorus?
When pH climbs above 6.2, phosphorus starts to fall out of solution, clogging drip lines and cutting what actually reaches the roots. Ultra PK's polyphosphate chemistry holds phosphorus in a plant-available form, keeping both the tank and the irrigation system running clean.
How to Use
- All stages, vegetative and generative: 0.5-1ml per litre alongside your Gold Label Base Nutrient.
- Mixing: never combine pure nutrients directly — always add each product to water separately.
- Preparation: shake the bottle before use.
- Storage: keep at room temperature, out of direct sunlight.

Free next-day delivery on orders over £50 (order by 3pm Mon–Thu). Heavy-item surcharges are always shown at checkout before you pay — we only ever charge what delivery costs us. Prefer to collect? Free pickup at our Wembley store.

