Canna Nutrient Chart: Setup Guide for Every Grow Medium

Why the Canna Nutrient Chart Isn't One-Size-Fits-All

If you've Googled "canna nutrient chart" and landed on a generic feeding table, you've probably noticed they don't all match. That's because CANNA publishes distinct nutrient lines for four different cultivation methods — and the dosing, pH, and EC targets change meaningfully between them. Running coco nutrients in soil, or dialing in pH to 6.0 when you're in a recirculating hydro system, will cost you yield and cause deficiencies that look baffling until you trace them back to the chart mismatch.

Of the 1,000 grow journals tracked on Grow Guide, 633 are soil grows and 149 use coco coir — which means the Terra and Coco lines cover the vast majority of home cultivators. But hydro and organic growers are well-represented too, so this guide covers all four. Use the Grow Schedule Planner to map these feeding windows to your actual flip date.

CANNA Terra: The Canna Nutrient Chart for Soil Grows

Terra Vega and Terra Flores are CANNA's workhorses for soil. They're formulated for a slightly higher pH range than the other lines because soil has its own buffering capacity and microbial activity that affects nutrient availability.

• Vegetative phase: Terra Vega — start at 3 mL/L in week 1, ramp to 5 mL/L by week 2. Maintain pH 5.8–6.2, EC 1.1–1.5 mS/cm.
• Flowering phase: Terra Flores — open at 5 mL/L, push to 7 mL/L by mid-flower. EC 1.4–1.7 mS/cm.
• Flush window: Drop all nutrients 10–14 days before harvest. EC back to 0.4–0.6 mS/cm (plain water only).

Additives worth using: Rhizotonic at 0.4 mL/L in early veg genuinely improves root development. Cannazym at 2.5 mL/L throughout flowering helps break down dead root matter and keeps the substrate clean. Cannaboost at 2 mL/L from week 3 of flower through week 7 is the additive growers argue about most — it's expensive, but if you're already dialing in environment (VPD 1.0–1.4 kPa in flower, PPFD 700–900 µmol/m²/s), it's worth trialing on one plant first.

Environment to pair with Terra: 28–30°C canopy temp under HPS, 28–33°C under LED (LEDs run cooler at the fixture but the broader spectrum pushes slightly higher canopy tolerance). Humidity 60–70% in veg, drop to 45–55% by mid-flower to stay inside safe VPD and reduce mold risk.

CANNA Coco: Different Line, Lower pH, Higher Frequency

Coco coir is chemically inert and doesn't buffer pH the way soil does. That means pH precision matters more, and you need to hit 5.5 consistently — not 5.8, not 6.0. Even a quarter-point drift over several feeds will lock out calcium and magnesium, which are the two deficiencies coco growers report most often. If you're seeing interveinal chlorosis or brown leaf tips and you're in coco, check your pH meter calibration before anything else. The Nutrient Deficiency Identifier can help you rule out other causes fast.

Unlike Terra, Coco A and B are used through both veg and flower — CANNA adjusts the NPK balance by ratios rather than switching products.

• Veg, week 1: Coco A + B at 2 mL/L each. EC 1.3–1.5 mS/cm, pH 5.5.
• Veg, week 2+: Increase to 3 mL/L each. EC 1.5–1.7 mS/cm.
• Flower, week 1: 3 mL/L each. EC 1.7–1.9 mS/cm.
• Flower, weeks 2–6: 4 mL/L each. EC up to 1.9 mS/cm. Watch runoff EC — if it climbs above 2.5, back off feed strength and irrigate more frequently.

Coco rewards frequent, smaller feeds over large, infrequent ones. If you're hand-watering, aim for 10–15% runoff at every feed. If you're running top-feed drain-to-waste (126 of the tracked Grow Guide journals use exactly this setup), feed 2–4 times per day at peak flower and keep the substrate moisture above 55% field capacity. Letting coco dry down too hard between feeds is where salt buildup starts.

CANNA Hydro: Tight pH, Higher EC Ceiling

CANNA's hydro line (Hydro Vega A&B / Hydro Flores A&B) is designed for recirculating and drain-to-waste systems. The pH target drops to 5.2 — tighter than soil, and lower than coco — because hydro has zero buffering and you want to hit the ideal uptake window for phosphorus and iron, which peaks right at that range in a soilless solution.

• Veg, week 1: Hydro Vega A+B at 1 mL/L each. EC 1.3 mS/cm, pH 5.2.
• Veg, week 2: 1.5 mL/L each. EC 1.5–1.7 mS/cm.
• Flower, week 1: Switch to Hydro Flores A+B at 2.5 mL/L each. EC 1.7–1.9 mS/cm.
• Flower, weeks 2–5: 3.5 mL/L each. EC up to 2.0 mS/cm.

In a recirculating system, top up the reservoir with pH-adjusted plain water between full reservoir changes. Change the full reservoir every 7–10 days in veg, every 5–7 days in flower. Root zone temperature matters here: keep it at 18–20°C to suppress pythium. Solution temp above 22°C and you're inviting root rot regardless of what's on your canna nutrient chart.

BIOCANNA: Organic Line, Different Logic

BioCanna (Bio Vega / Bio Flores) runs on a fundamentally different principle — you're feeding the soil biology, which then makes nutrients available to the plant. Doses are lower because the microbial layer amplifies what's there. Don't chase high EC numbers with organic nutrients; it kills the biology you're depending on.

• Veg, week 1: Bio Vega at 1 mL/L. EC 1.0–1.2 mS/cm.
• Veg, week 2: 1.5 mL/L.
• Flower, week 1: Bio Flores at 3 mL/L.
• Flower, week 2+: 4 mL/L. EC 1.3–1.7 mS/cm.
• pH target: 6.0–7.0 (wider range because the biology self-regulates more than synthetic systems do).

BioRhizotonic at 2 mL/L in the first two weeks of veg sets up the root zone. BioBoost at 2 mL/L from week 3 of flower is the organic equivalent of Cannaboost. For more on organic nutrient strategy, see our guide to best organic nutrients for cannabis.

Canna Nutrient Chart: Medium-by-Medium Comparison

Additive Stack: What's Worth the Money on the Canna Nutrient Chart

CANNA's additive lineup can feel like a sales funnel if you buy everything at once. Here's how to think about it in priority order:

1. Rhizotonic (all lines): High priority in weeks 1–3. Roots set everything else up. At 0.4–2 mL/L depending on line, it's cheap insurance. Use it every feed in early veg, then taper off once roots are established.
2. Cannazym: Medium priority. Most useful in coco and soil, where dead root matter accumulates. 2.5 mL/L from mid-veg through flush. Skip if you're in a clean hydro setup with DWC where there's less substrate to enzymatically digest.
3. PK 13/14: CANNA's phosphorus-potassium spike for weeks 4–5 of flower. Add at 1.5 mL/L for one week only, then stop. Don't run it alongside Cannaboost — that's a common EC spike mistake.
4. Cannaboost: Low-to-medium priority until your environment is dialed in. PPFD under 600 µmol/m²/s? Fix the light first. At 2 mL/L from week 3 through week 7 of flower, it's the most expensive line item. Use our Cost Per Gram Calculator to see if it pencils out for your setup.

Budget vs Premium Setup: Gear You Actually Need

Running CANNA nutrients properly requires a few pieces of equipment you shouldn't cheap out on, and several you can safely go budget on.

Don't Cheap Out On

• pH meter: A $15 pen from a garden center will drift and destroy your coco or hydro run within two weeks. Budget at least $50–80 for a Milwaukee MW102 or Bluelab pH pen. Calibrate weekly with two-point calibration (pH 4.0 and 7.0 solutions).
• EC/TDS meter: EC tells you how concentrated your solution is. In coco and hydro, this is non-negotiable. Bluelab Truncheon ($90–120) is the benchmark. The HM Digital COM-80 ($45) is a solid budget pick that holds calibration well.
• Graduated syringes or dosing pumps: Eyeballing 2.5 mL/L when you're mixing 20L batches is where people make chart errors. Get 1 mL and 5 mL syringes, or a 4-channel dosing pump if you're automating.

Budget-Friendly Options

• Mixing containers: Food-grade 20–25L buckets from any hardware store. No need for branded grow gear here.
• Thermometer/hygrometer: Govee or Inkbird sensors ($15–25) log data via Bluetooth and give you a history you can actually use to troubleshoot.
• Timer and scale: A postal scale accurate to 0.1g for solid amendments, and a $10 outlet timer for light cycles. Both are buy-once tools.

Feeding Schedule Timeline: Week-by-Week Framework

Common Mistakes When Following a Canna Nutrient Chart

1. Starting at full dose. Every CANNA chart shows maximum doses for peak development. New growers who hit 7 mL/L Terra Flores in week 1 of flower on young plants will see tip burn and lockout within days. Start every phase at 30–40% of the listed maximum and ramp up over two weeks as the plant's root system and canopy develop.

2. Ignoring runoff EC. CANNA's charts tell you what goes in. What comes out tells you what's actually happening in the root zone. If your runoff EC is more than 0.5 mS/cm above your feed EC, salts are accumulating. Flush with plain pH-adjusted water at the correct pH for your medium until runoff EC drops below 1.2 mS/cm, then resume feeding.

3. Mixing A and B together undiluted. CANNA Coco A+B and Hydro Vega/Flores A+B should always be added to water separately — never pre-mixed. Add A first, stir, then add B. Combining them directly causes calcium-phosphate precipitation that can clog drip lines and reduce nutrient availability.

4. Using the wrong line for the medium. Terra nutrients in coco will create calcium deficiency because the formulation assumes soil's natural calcium buffering. Coco A+B in soil will oversaturate calcium. The lines are not interchangeable.

If you suspect a deficiency is already underway, run it through the Nutrient Deficiency Identifier before adding anything — more nutrients are rarely the answer to a problem caused by pH being off. For seedling-specific feeding questions, our seedling nutrients guide covers the first two weeks in detail. And when you're ready to map your feeding schedule against your actual grow timeline, the Grow Schedule Planner makes it easy to set week-by-week reminders.

References

1. CANNA Research (2024). CANNA Terra Feeding Schedule and Environmental Parameters. Official product documentation covering pH, EC, and dosing for Terra Vega and Terra Flores in soil cultivation. hyjo.co.uk/feedcharts/canna/terra
2. CANNA Research (2024). CANNA Coco Feeding Schedule. Dosing chart for Coco A+B across vegetative and flowering phases, with EC and pH targets for coco coir cultivation. hyjo.co.uk/feedcharts/canna/coco
3. CANNA Research (2024). CANNA Aqua/Hydro Feeding Schedule. Hydro Vega and Hydro Flores dosing chart for recirculating and drain-to-waste hydroponic systems, including reservoir management protocol. hyjo.co.uk/feedcharts/canna/aqua
4. Grow Guide Platform Data (2026). Grow Journal Analysis: 1,000 Tracked Cannabis Grows. Internal dataset showing medium distribution (633 soil, 149 coco coir) and feeding method breakdown across active grow journals on Grow Guide.
5. Bugbee, B. (2016). Nutrient Management in Recirculating Hydroponic Culture. Utah State University. Covers EC management, solution pH dynamics, and calcium-phosphate precipitation in two-part nutrient systems — principles directly applicable to CANNA A+B formulations. digitalcommons.usu.edu