Canna Coco Feed Chart – A+B Doses, EC and pH
Canna's own published Coco A+B schedule. Millilitres per 10 litres of water, rooting through to flower week 9.
- All dosesper 10 litres
- pH5.5 – 6.2
- Base feed15–40ml of each part
- Run9 flower weeks
The chart as text
| Stage | Light | Coco A & B | Rhizotonic | Cannazym | Boost | PK 13/14 | EC total |
|---|---|---|---|---|---|---|---|
| Rooting · days 1–5 | 18 h | 15–25ml | 40ml | – | – | – | 1.1–1.5 |
| Vegetative · weeks 1–3 | 18 h | 20–30ml | 20ml | 25ml | – | – | 1.3–1.7 |
| Stretch · flower wk 1–2 | 12 h | 25–35ml | 20ml | 25ml | 20ml | – | 1.5–1.9 |
| Flowering · flower wk 3–5 | 12 h | 30–40ml | 5ml | 25ml | 20–40ml | – | 1.8–2.2 |
| Flowering · flower wk 6 | 12 h | 30–40ml | 5ml | 25ml | 20–40ml | 15ml | 2.0–2.4 |
| Flowering · flower wk 7–8 | 12 h | 20–30ml | 5ml | 25ml | 20–40ml | – | 1.4–1.8 |
| Ripening · flower wk 9 | 10–12 h | – | – | 25–50ml | 20–40ml | – | 0.4 |
Every figure is millilitres per 10 litres of water. The Coco figure is per part — the same amount of A and of B. EC total assumes tap water at EC 0.4. Vegetative weeks count from rooting; flower weeks restart at the switch to 12 hours.
Getting it right
- Never mix A and B neat. Add A to a full reservoir, stir, then add B and stir again. Mixed undiluted they form compounds the plant cannot take up.
- Set the EC first, then the pH. Canna are firm about the order, and about not fighting pH Up against pH Down — it wrecks the water's buffering.
- Feed at 20–25 °C. Below 15 °C uptake drops away. Mix with cold water and the pH climbs as it warms.
- Double the Cannazym to 50ml if you are re-using your coco.
- PK 13/14 for one week only, three weeks out. On very hard water use pH- grow rather than pH- bloom that week, or it can precipitate in the tank.
- Do not pre-soak coco. Drip it with 2ml of A and 2ml of B per litre at pH 5.2–6.2 until it drains. Keep it slightly dry — warm and wet is what Pythium wants.
Everything on the chart
Canna Coco A&B
From £11.99
One feed, whole cycle
Canna Rhizotonic
From £11.99
40ml first dose
Canna Cannazym
From £6.49
25ml every feed
Canna Boost
From £19.49
20–40ml in flower
Canna PK 13/14
From £3.99
15ml, one week
Coco Professional Plus
£13.35
Buffered and ready
Canna Cal-Mag Agent
From £12.49
Soft or RO water
Coco Starter Kit
£54.49
The whole chart in one box
Common questions
The chart gives a range — which end do I use?
Start at the bottom and work up while watching the EC. The range exists because your water, your light level and your medium all move the target.
My tap water is EC 0.6. What do I do?
That is Canna's "hard" band. Blend with RO down to about EC 0.4 before anything goes in, then follow the chart.
Do I need every additive?
No. The base feed does the work. Rhizotonic early and Cannazym through the run are the two most growers keep.
Is there a newer Canna chart?
Canna's international site serves a revised version with different rates and Canna Flush in the last two weeks. The chart above is Canna UK's, which matches the bottles sold here.
Figures as published by Canna UK in their Coco grow schedule and information paper, canna-uk.com/downloads. Always read the label on the bottle you own. Canna is a trade mark of its owner.