Plant Magic Coco A&B — Two-Part Base Nutrients for Coco Growing
Best for: Growers wanting a proper coco-specific nutrient that handles hard and soft water without fussing
Our thoughts
This is a solid entry-level coco base that covers everything you need throughout the entire growing cycle without overcomplicating things. Made in the UK with British water profiles in mind, it's designed to handle calcium and magnesium the way coco demands — which most feeds don't. One we recommend a lot for growers moving into coco from soil.
Plant Magic Coco A&B is a balanced two-part mineral nutrient formulated specifically for growing in coco coir substrates. Unlike generic feeds, this one understands how coco works — it contains extra calcium and magnesium because coco naturally binds those elements and makes them unavailable to plants. The result is a single formula you can run from start to finish without switching products mid-cycle.
Developed by PhD-level biochemists and optimised for UK water conditions (both hard and soft areas), it delivers the full spectrum of macro and micronutrients your plants need, plus bio-stimulants to keep roots and foliage healthy.
How it compares
Plant Magic Coco A&B sits in the reliable, properly-formulated coco base category.
- Built specifically for coco coir — not adapted from soil or generic hydro feeds
- Single formula for the entire growing cycle (no separate vegetative and flowering versions needed)
- Compensated for coco's natural calcium and magnesium binding
- Significantly cheaper than premium brands like CANNA while delivering proper results
- Works with both hard and soft UK water without additional adjustments
If CANNA is the household name, Plant Magic is the one that actually understands British water and does the job properly without the premium markup.
Usage guidance
Mixing
Never mix parts A and B together neat — it'll crash out of solution. Add A to water first, stir thoroughly until dissolved, then add B. Keep them separate until they hit the water.
Feeding rate
Use at 2–4ml per litre of each part (equal amounts). Start at 2ml/L for young plants, move to 3–4ml/L as they grow and demand more. This translates to roughly 1EC at mid-range dosing.
Hand watering
Works cleanly in pots. Aim for 10–20% runoff to prevent salt buildup — coco tolerates this better than soil, and it helps keep the medium fresh.
Drip and automated systems
Run-to-waste is best in coco. The medium's fast drainage means recirculating can build up salts and pH drift. Nutrient film or flood-and-drain systems work fine too.
System compatibility
Plays well with coco-specific additives from the Plant Magic range — PK 13/14 boosters and silica work alongside it without conflicts.
Technical specifications
- Type: Two-part mineral base nutrient
- Formulation: Coco-specific, balanced NPK
- Dilution rate: 2–4ml per litre (equal parts A and B)
- NPK (Part A): 4.4% Nitrogen, with enhanced calcium (6.4% CaO) and magnesium (0.9% MgO)
- Includes: Micronutrients, humates, calcium, and magnesium — everything needed for the full growth cycle
- Water suitability: Formulated for hard and soft UK water
- Available sizes: 1 litre, 5 litre, and 10 litre bottles
- Format: Liquid concentrate
Who this is for
- Growers moving into coco from soil and wanting something forgiving and straightforward
- Budget-conscious growers who don't want to pay premium brand prices for a working coco base
- UK growers using hard tap water who need a nutrient designed around British water profiles
- Anyone running hand-fed or drip-fed coco systems where consistency matters
- Growers who want one formula for the whole cycle instead of juggling separate veg and bloom feeds
Our take
This is a proper coco nutrient at a price that actually makes sense. It's been around long enough to prove itself, it's designed around how coco really works, and it won't fight you if you pay attention to basic mixing and feeding discipline.
If you're building a coco setup and want something reliable without the premium markup, worth picking up. Does exactly what a coco base should do — delivers clean, stable growth from start to finish without drama.
