• Gold Label Ultra PK — 1L
  • Gold Label Ultra PK — 5L
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Gold Label

Gold Label Ultra PK – Polyphosphate Flowering Additive

Gold Label Ultra PK – Polyphosphate Flowering Additive

£34.95 GBP
£39.95 GBP £34.95 GBP
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Order by 3pm Mon–Fri — we aim to post same day · FREE Express Delivery over £60 · 1–2 working days · 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.
Feed Chart
Gold Label Ultra PK · all media, vegetative and generative stages
Stage Per 1 L Per 10 L
All stages — with your Gold Label base nutrient 0.5–1 ml 5–10 ml
Note — Never combine pure nutrients directly — add each product to the water separately. Shake before use and store at room temperature, out of direct sunlight. Check pH and EC after mixing.

FREE Express Delivery on orders over £60. We aim to post same day on Express Delivery — order by 3pm Mon–Fri — and delivery takes 1–2 working days. A few harder-to-stock or large, bulky items can take a little longer — we'll tell you if that applies to your order. 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.