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Crazy Hills

Crazy Hills Prosper – Organic Bloom Fertiliser

Crazy Hills Prosper – Organic Bloom Fertiliser

Regular price £53.90
Regular price Sale price £53.90
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£10.78 per litre · 5L

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Order by 3pm Mon–Fri — we aim to post same day · FREE Express Delivery over £99 · 1–2 working days · Free Wembley pickup

  • 14-day returns
  • Price match promise
  • Free Wembley store pickup
  • Advice from the team: 020 3488 0419
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Description

Organic phosphorus and potassium for flowering and fruiting

Crazy Hills Prosper is a plant-based organic bloom fertiliser with an NPK of 2-3-3, supplying organic phosphorus and potassium alongside seaweed extract (Ascophyllum nodosum), corn steep liquor – a natural source of amino acids, vitamins and peptides – and humic and fulvic acids. Introduced at the end of veg and stepped up through bloom, it drives flower set, density and expansion and supports flavour and aroma, while keeping plants strong at the point of peak demand. It is 100% plant-based and vegan-friendly.

Key Benefits

  • Steady organic PK (NPK 2-3-3) for flowering and fruiting
  • Flower set and expansion driven by organic PK and seaweed extract
  • Flavour and aroma supported by humic and fulvic acids with micronutrients
  • Amino acids, vitamins and peptides from corn steep liquor to keep plants strong in peak bloom
  • Optional extra PK in bloom weeks 6–7 without adding harsh salts
  • Plant-based and vegan-friendly

Flowering that fades when demand peaks

Mid to late bloom is when a plant's call for phosphorus and potassium is highest; if the feed cannot keep up, flowers and fruit stop filling out and plants run short of energy just when they need it most. Prosper builds its PK up week by week, from 1 ml per litre at the start of flowering to 4 ml – or up to 6 ml as an extra PK boost – in weeks 6–7, with seaweed extract and corn steep liquor supporting nutrient uptake and plant vigour all the way through.

How to Use

  • End of veg: 0.5 ml per litre in vegetative week 4.
  • Flowering stage: 1 ml per litre in week 1, 2 ml in week 2, 3 ml in weeks 3–5, 4 ml in weeks 6–7 and 3 ml in week 8.
  • Extra PK boost: add a further 2 ml per litre in weeks 6–7 if plants need more.
  • Pair it with: Crazy Hills Elan and Spark through bloom; Upthrive tapers off as Prosper takes over.
  • Mixing: add to the water, stir, then check EC and adjust pH to 6.0–6.5 in bloom.

Technical Specifications

  • Type: organic bloom (flowering) fertiliser
  • NPK: 2-3-3
  • Ingredients: seaweed extract (Ascophyllum nodosum), corn steep liquor (amino acids, vitamins, peptides), organic phosphorus (P₂O₅), organic potassium (K₂O), humic acids, fulvic acids
  • Formulation: 100% plant-based, vegan-friendly
  • Dose: 0.5 ml/L end of veg; 1–4 ml/L in bloom (up to 6 ml/L in weeks 6–7)
  • Solution pH: 6.0–6.5 in bloom (5.8–6.2 in veg)
  • Best suited to: soil and other biologically active root zones (the maker builds its chart around a light soil mix)
  • Stage: end of veg through flowering
  • Brand: Crazy Hills
Feed Chart
CRAZY HILLS Prosper · organic bloom feed · added to the water at every feed
Stage Per 1 L Per 10 L
Vegetative weeks 1–3 — —
Vegetative week 4 0.5 ml 5 ml
Bloom week 1 1 ml 10 ml
Bloom week 2 2 ml 20 ml
Bloom weeks 3–5 3 ml 30 ml
Bloom weeks 6–7 4 ml (up to 6 ml) 40 ml (up to 60 ml)
Bloom week 8 3 ml 30 ml
Note — Crazy Hills' own feeding chart (EU). Target pH 5.8–6.2 in veg and 6.0–6.5 in bloom; heavy-feeding crops can take 10–20% more. The higher figure in weeks 6–7 is the optional extra PK boost. Set EC first, then adjust pH, once every base nutrient and additive is in the tank.

Frequently Asked Questions

When do I start using Prosper?

A light 0.5 ml per litre goes in during the last week of veg, then it rises from 1 ml to 3 ml per litre over the first weeks of flowering.

Do I need a separate PK booster?

Not usually – Crazy Hills build the extra PK into Prosper itself, adding up to 2 ml per litre more in bloom weeks 6–7 when plants need it.

Is Prosper organic?

It is a 100% plant-based, vegan-friendly organic fertiliser; its phosphorus and potassium come in organic form alongside seaweed and corn steep liquor.

FREE Express Delivery on orders over £99. 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.