British Minerals Pro PK 13/14 Flowering Booster
British Minerals Pro PK 13/14 Flowering Booster
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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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A Concentrated 13/14 Hit at the Peak of Flowering
British Minerals Pro PK 13/14 is a high-concentration phosphorus and potassium booster with an NPK of 0-13-14 - 13% phosphorus and 14% potassium, and no nitrogen at all. That is deliberate: nitrogen at the back end of bloom pushes leaf rather than flower, so it is left out entirely and the two elements that actually build fruit are supplied in quantity instead.
Phosphorus drives metabolism and energy transfer, which is what the plant needs more of than anything else once it is committed to fruiting. Potassium governs water and nutrient transport, plant rigidity and sugar production, so it determines both the quality and the structural integrity of what you harvest. Pro PK supplies both in great quantity, in a simple one-bottle addition that suits any growing medium and drops into any existing feed programme.
Key Benefits
- NPK 0-13-14 - a true PK booster with no nitrogen to push unwanted late leaf growth
- 13% phosphorus for higher metabolic rate and energy transfer through fruiting
- 14% potassium for water transport, plant rigidity and sugar production
- High concentration - a modest 1.5ml per litre is all it takes
- Suits every medium - coco, soil, rockwool and all hydroponic systems
- Simple to run alongside any base feed and any additive programme
Flowers That Set Well and Then Stop Filling
Mid flowering is the point at which demand for phosphorus and potassium outruns anything a balanced base feed is designed to deliver. When that happens the plant keeps the sites it has already set but stops adding weight to them, and no amount of extra base nutrient fixes it because the nitrogen that comes with it works against you. A dedicated PK at high concentration, introduced from mid bloom and held to the end, is what carries the crop through those final weeks.
How to Use
- Shake well before use
- All media and systems: 1.5ml per litre of water
- Timing: from mid flowering (week 7) through to the end of the flowering phase
- Add to the reservoir with your normal feed and mix thoroughly before use
- Check EC and pH after adding - a concentrated PK will move both
- Stop at flush and finish on plain water
- Do not exceed the recommended rate - excess can create anaerobic conditions in the medium
Technical Specifications
- Type: PK flowering booster
- NPK: 0-13-14
- Phosphorus: 13%
- Potassium: 14%
- Nitrogen: none - deliberately excluded for late bloom
- Dose rate: 1.5ml per litre of water
- Timing: mid flowering through to the end of the flowering phase
- Suitable for: all growing media and all systems
- Manufactured in the United Kingdom

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