GreenHaze Grow A&B – Two Part Hydroponic Vegetative Feed
GreenHaze Grow A&B – Two Part Hydroponic Vegetative Feed
£7.99 per litre · 5L (2 x 5L)
In stock
Couldn't load pickup availability
Share
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
Description
A classic hard-or-soft-water twin pack for strong, sturdy vegetative growth
GreenHaze Grow A&B is Growth Technology's two-part hydroponic base nutrient for the vegetative stage, made in the UK. It is a classic twin pack: Part A carries the calcium nitrate and chelated iron, Part B the phosphorus, potassium, magnesium, sulphur and chelated trace elements, kept apart in concentrate so nothing locks up in the bottle. Mixed at 4 ml of each part per litre, it suits hard or soft water and is made for active hydroponic systems and inert media. Growth Technology formulate it for growers who want to push their plants that bit further, and when the first flowers form you switch to GreenHaze Bloom A&B.
Key Benefits
- Two-part A&B formula — calcium stays apart from phosphates and sulphates until it reaches the tank
- Hard or soft water — one formulation for either supply
- Simple dosing — 4 ml/L of A and 4 ml/L of B, to an EC of 1.5–2.2 mS/cm
- Complete nutrition — nitrate nitrogen, phosphorus, potassium, calcium, magnesium, sulphur and chelated trace elements
- Pairs with GreenHaze Bloom A&B for a two-stage programme
- Made in the UK by Growth Technology
Slow, Pale Vegetative Growth
Plants in a hydroponic system or an inert medium depend entirely on what is in the tank. A weak or unbalanced feed shows up as pale new leaves, thin stems and slow growth, and poor nutrient uptake follows quickly when calcium, magnesium or trace elements run short. GreenHaze Grow is blended from pure, highly soluble minerals to give a balanced, complete solution through vegetative growth, building strong, sturdy plants with the structure to carry heavy flowering and fruiting later.
How to Use
- Work out your tank volume, then add 4 ml of Part A per litre (20 ml, one capful, per 5 litres) and stir well
- Add the same amount of Part B — 4 ml per litre — and stir again; never mix A and B together undiluted
- Check EC: aim for 1.5–2.2 mS/cm, adding more nutrient if needed
- Check pH last: 5.5–6.2, adjusting with Growth Technology pH Up or pH Down
- Use through vegetative growth, then switch to GreenHaze Bloom A&B once flowers are produced
- Store above 6 °C — the minimum storage temperature on the label
Technical Specifications
- Type: two-part (A&B) hydroponic base nutrient
- Growth stage: vegetative
- Part A analysis: 4.6-0-1.1 — nitrogen 4.65% (nitrate 3.77%, ammoniacal 0.88%), potassium oxide 1.09%, calcium oxide 4.76%, iron (EDTA) 0.06%
- Part B analysis: 1.8-2.3-7.7 — nitrate nitrogen 1.83%, phosphorus pentoxide 2.29%, potassium oxide 7.67%, copper (EDTA) 0.003%, manganese (EDTA) 0.018%, molybdenum 0.001%, zinc (EDTA) 0.006%; also magnesium, sulphur and boron
- Dose rate: 4 ml Part A + 4 ml Part B per litre
- Target EC: 1.5–2.2 mS/cm
- Target pH: 5.5–6.2
- Water: hard or soft
- Systems: active hydroponic systems and inert media
- Minimum storage temperature: 6 °C
- Made in: UK, by Growth Technology Ltd, Taunton
| Stage | Per 1 L | Per 10 L |
|---|---|---|
| Part A (add first, stir) | 4 ml | 40 ml |
| Part B (add second, stir) | 4 ml | 40 ml |
Frequently Asked Questions
Is GreenHaze Grow for hard or soft water?
Both. Growth Technology make one GreenHaze formulation that suits hard and soft water areas alike, so there is no separate version to choose.
When do I switch to GreenHaze Bloom?
Use GreenHaze Grow until flowers are produced, then change to GreenHaze Bloom A&B at the same 4 ml per litre of each part.
Can I use GreenHaze in soil?
It is formulated for active hydroponic systems and inert media. For soil, Growth Technology make IONIC Soil Grow.
What EC should I run?
Growth Technology recommend 1.5–2.2 mS/cm. Mix 4 ml of each part per litre, measure, and add a little more nutrient if the EC is below your target.
Works Well With
GreenHaze Bloom A&BThe flowering-stage partner to switch to
Growth Technology pH Down 30%The pH Down the label recommends
Growth Technology pH UpFor raising pH in soft water

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.
