RAW Potassium
RAW Potassium
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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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Half potassium by weight, from a single clean source
RAW Potassium contains 50% water-soluble potash derived from potassium sulphate — the highest concentration of natural water-soluble potassium available to the home gardener. Potassium drives a wide range of plant processes, from water regulation to flower and fruit development, and is one of the elements most commonly pushed hard through flowering.
As a straight, single-element product, it lets a grower increase potassium precisely without also increasing phosphorus or nitrogen the way a blended PK booster would, which matters when a feed is already balanced everywhere except one element.
Key Benefits
- 50% water-soluble potash, the highest concentration available to home growers
- Sourced from potassium sulphate
- Corrects a potassium deficiency without shifting other elements
- Builds custom feeds alongside the rest of the RAW straight-element range
- Suits soil, coco and hydroponic systems
How to Use
- Add to the reservoir to correct a diagnosed potassium deficiency, or as part of a custom-built feed
- Dissolve fully before combining with other nutrients
Technical Specifications
- Guaranteed analysis: 50% water-soluble potash (K2O)
- Source: potassium sulphate
- Format: soluble powder

FREE Express Delivery on orders over £60. We aim to post same day for next-working-day arrival — order by 3pm Mon–Fri. Delivery is 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.