Canna Feeding Schedule & Feed Chart 2026: Terra, Coco A&B, and Aqua (EC/PPM Guide)
Complete Canna feeding schedule and feed chart for soil (Terra), coco (Coco A&B), and hydro (Aqua) — week-by-week EC/PPM charts, pH targets, and flush timing. The most detailed Canna nutrients guide online.
Why Canna Is the Go-To Brand for Serious Growers
Canna is a Dutch nutrient company founded in 1993 that has become the benchmark for professional cannabis cultivation. Their product lines are formulated specifically for cannabis — not repurposed tomato nutrients — which is why Canna-fed plants consistently produce dense, resinous buds with predictable results.
This guide covers the three most popular Canna lines:
Canna Terra — for soil grows
Canna Coco A&B — for coco coir grows
Canna Aqua — for recirculating hydro systems
All feed charts below use EC (electrical conductivity) as the primary measurement. If you're using PPM, multiply EC × 500 (Truncheon method) or EC × 700 (HM Digital method). We use the 500 scale throughout this guide.
Canna Terra Feeding Schedule (Soil)
Canna Terra Vega (grow) and Terra Flores (bloom) are the foundation of the Terra line. Add Cannazym (enzyme), Rhizotonic (root stimulator), and PK 13/14 (bloom booster) for full expression.
pH Target for Soil: 6.0–7.0 (optimal 6.2–6.8)
Water between feeds: Always water plain pH'd water between nutrient feeds to avoid salt buildup.
| Week |
Stage |
Terra Vega |
Terra Flores |
Cannazym |
EC (mS/cm) |
| 1–2 | Seedling | 10 ml/10L | — | — | 0.8–1.2 |
| 3–4 | Early Veg | 20 ml/10L | — | 10 ml/10L | 1.4–1.8 |
| 5–6 | Late Veg | 30 ml/10L | — | 10 ml/10L | 1.8–2.2 |
| 7 | Transition | 15 ml/10L | 15 ml/10L | 10 ml/10L | 1.8–2.2 |
| 8–9 | Early Bloom | — | 30 ml/10L | 10 ml/10L | 1.8–2.4 |
| 10–11 | Mid Bloom | — | 40 ml/10L | 10 ml/10L | 2.0–2.6 |
| 12 | Late Bloom + PK 13/14 | — | 40 ml/10L | 10 ml/10L | 2.2–2.8 |
| 13–14 | Flush | — | — | — | 0.0–0.4 |
PK 13/14: Add 15 ml/10L during weeks 10–12 alongside Terra Flores. This phosphorus-potassium booster drives bud swelling and density. Do not use beyond week 12 or you risk nutrient lockout during flush.
Canna Coco A&B Feeding Schedule
Canna Coco A&B is a two-part base nutrient used from seedling through flush. Unlike soil nutrients, Coco A&B is designed to compensate for coco's natural calcium and magnesium binding properties — always add A and B in equal parts, never one without the other.
pH Target for Coco: 5.5–6.1 (optimal 5.7–5.9)
Feeding frequency: Feed every watering in coco — never plain water between feeds (coco requires constant moisture and nutrient availability).
| Week |
Stage |
Coco A |
Coco B |
Cannazym |
EC (mS/cm) |
| 1 | Seedling | 15 ml/10L | 15 ml/10L | — | 0.8–1.2 |
| 2–3 | Early Veg | 25 ml/10L | 25 ml/10L | 10 ml/10L | 1.4–1.8 |
| 4–5 | Late Veg | 35 ml/10L | 35 ml/10L | 10 ml/10L | 1.8–2.2 |
| 6–7 | Early Bloom | 40 ml/10L | 40 ml/10L | 10 ml/10L | 1.8–2.4 |
| 8–10 | Mid Bloom | 45 ml/10L | 45 ml/10L | 10 ml/10L | 2.0–2.6 |
| 11–12 | Late Bloom | 45 ml/10L | 45 ml/10L | 10 ml/10L | 2.2–2.8 |
| 13 | Flush | — | — | — | 0.0–0.4 |
Note: Always buffer your coco before first use. Soak coco in a solution of 5.8 pH water with 3–4 ml/L Cal-Mag for 24 hours. Unbuffered coco will strip calcium from your nutrient solution causing deficiencies in week 1.Canna Additives: What's Worth It
Canna makes several additives. Here's an honest breakdown of what moves the needle:
Rhizotonic (5–10 ml/10L): Root stimulator containing B vitamins and plant hormones. Use weeks 1–4 to accelerate root development. Noticeably speeds up early growth — worth using.
Cannazym (10 ml/10L): Enzyme formula that breaks down dead root matter and prevents root rot. Essential in coco and hydro systems. Optional in soil.
Boost Accelerator (20 ml/10L): Canna's premium bloom booster containing triacontanol and plant extracts. Use weeks 8–12. Results vary by genetics but generally improves terpene production and density.
PK 13/14 (15 ml/10L): Straight phosphorus-potassium supplement for bud swelling. Use for 1–2 weeks at peak bloom (typically weeks 10–12). Do not use for more than 2 weeks — it will cause nutrient burn.
Cannaboost vs PK 13/14: Use one or the other, not both simultaneously. Cannaboost supports metabolism. PK 13/14 drives raw bud mass. Most growers choose PK 13/14 for weight and Cannaboost for quality.
EC Troubleshooting: What to Do When Numbers Are Off
EC too high (over 3.0): Salt buildup. Flush with plain pH'd water until runoff EC drops below 1.0, then resume at 50% of target dose.
EC too low (under 1.0 in bloom): Plants are hungry. Increase dose by 10–15% and watch for response within 48 hours.
Runoff EC significantly higher than input: Salts are accumulating in your medium. Flush immediately and reduce dose by 20%.
pH drift despite correct input: Often caused by microbial activity in soil or organic matter breakdown. In coco/hydro, check reservoir temperature — above 72°F promotes pH-shifting bacteria. Keep reservoirs at 65–68°F.
For more detail on nutrient management, see our
Cannabis Nutrient Schedule and
Cannabis PPM Chart.
Frequently Asked Questions
What is the Canna feeding schedule for coco?
For Canna Coco A&B: Start at 15 ml each per 10L (EC 0.8–1.2) in seedling, increase to 35 ml each (EC 1.8–2.2) in veg, and peak at 45 ml each (EC 2.2–2.8) in late bloom. Always feed every watering in coco — never plain water between feeds. Target pH 5.7–5.9.
How often should I feed with Canna nutrients?
In coco: every watering (daily or every other day). In soil: every second or third watering, alternating with plain pH'd water. In hydro: continuous or top-fed multiple times daily depending on your system. Always let runoff reach 10–20% of input volume to prevent salt accumulation.
Can I mix Canna Terra with Canna Coco nutrients?
No. Canna Terra and Canna Coco are formulated for different substrates. Terra nutrients are pH-buffered for soil (6.0–7.0). Coco nutrients compensate for coco's unique calcium-binding properties and target 5.5–6.1 pH. Using Terra nutrients in coco will cause calcium and magnesium deficiencies.
When should I use Canna PK 13/14?
Use PK 13/14 for 1–2 weeks at peak bloom — typically weeks 10–12 for a 14-week photoperiod strain. Add 15 ml per 10L alongside your base nutrients. Do not use for more than 2 consecutive weeks as the high phosphorus load causes nutrient lockout and burn in late flower.
What EC should I target with Canna nutrients?
Seedling: 0.8–1.2 EC. Vegetative: 1.4–2.2 EC. Early bloom: 1.8–2.4 EC. Peak bloom: 2.2–2.8 EC. Final flush: 0.0–0.4 EC. These are total EC values including your baseline water EC. If your tap water is 0.4 EC, subtract that from target values when mixing nutrients.
Do I need Cannazym with Canna nutrients?
Cannazym is highly recommended for coco and hydro grows where enzyme activity is lower than in living soil. It breaks down dead root matter that would otherwise harbour harmful bacteria. In organic soil grows with healthy microbial populations, Cannazym is optional but still beneficial during flush weeks.
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