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CANNA Coco feeding schedule and calculator

CANNA's official Coco A and B schedule, phase by phase, scaled to the water you're mixing. Use equal amounts of A and B. The amounts shown are for each part.

Checked Oct 20, 2026 Source: CANNA COCO Grow Schedule (US, mL per gallon)
How to read a feeding chart Schematic of a 12 week feed chart. Each week shows the label dose as a dashed outline, a solid start at 50 percent, and a gold work-up band to 75 percent. Veg weeks 1 to 4, flower 5 to 11, flush week 12. FIG. 01 · READING A FEED CHART SCHEMATIC, NOT A BRAND CHART Label dose, and where to start LABEL 100% WORK UP 75% START 50% 01 02 03 04 05 06 07 08 09 10 11 H₂O 12 VEG · WK 1 TO 4 FLOWER · WK 5 TO 11 FLUSH
01

Mix calculator

Pick a week and how much you're mixing

Many growers here feed below the chart. Start low and raise it only if the plants want more.
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Turn on JavaScript to use the calculator, or read the full schedule below.
02

The full schedule

mL per gallon of water, at full strength

CANNA Coco is one mix for growth and flower. Add A, stir, then add B.

Stage Length Coco A Coco B RHIZOTONIC CANNAZYM CANNABOOST PK 13/14 EC
Start and rooting (3 to 5 days) Less than 1 week 6–10 6–10 15 0.7–1.1
Vegetative phase I 0 to 3 weeks 8–12 8–12 8 10 0.9–1.3
Vegetative phase II (stretch, until flowers form) 2 to 4 weeks 10–13 10–13 8 10 8 1.1–1.5
Generative period I (flowers lengthen) 2 to 3 weeks 12–15 12–15 2 10 8–15 1.4–1.8
Generative period II (flowers fill out) 1 week 12–15 12–15 2 10 8–15 6 1.6–2.0
Generative period III (flowers gain weight) 2 to 3 weeks 8–12 8–12 2 10 8–15 1.0–1.4
Generative period IV (ripening) 1 to 2 weeks 10–19 8–15 0.0

pH 5.5 to 6.2.

03

Notes from the chart

  • Amounts are mL per US gallon, from CANNA's US grow schedule.
  • EC is what the nutrients add (EC+), measured with water at 0.0. Add your own water's EC to get the total.
  • The changeover from 18 to 12 hours varies by strain. CANNA's rule of thumb is to change after 2 weeks.
  • Double CANNAZYM to 19 mL per gallon if you're reusing the medium. CANNABOOST is 8 mL per gallon as standard, up to 15 for extra flowering power.
  • In ripening, reduce the light hours if plants ripen too fast, and watch rising humidity.
  • CANNA says its guidelines aren't an iron law. Temperature, humidity, root volume and watering all change what plants need.

Source: CANNA COCO Grow Schedule (US, mL per gallon)

04

What growers here actually run

From the THCFarmer archive

  • With CANNA Coco A and B in pure coco, treat it like hydro: feed every watering, at least once a day. Start around 0.4 to 0.6 EC and work up.

    justiceman Read the post →

  • Runs CANNA A and B at 10 mL per gallon, with cal-mag to bring filtered water up to 0.4 EC.

    Farmer P Read the post →

  • Feeding CANNA Coco at EC 1.7 in Autopots. Added 1 mL per liter of cal-mag for magnesium, but dimming the light and warming the room fixed it.

    420BigBud Read the post →

  • CANNA A and B is meant to be a complete feed all the way to the chop, so you shouldn't need extra bloom nutrients. Keep EC under 2.4 in and out.

    Ninjadogma Read the post →

  • Top-feeds coco with CANNA A and B plus MPK only, pH at 5.6, maxing out at 2.3 EC.

    DowNwithDirT Read the post →
05

Threads worth reading

Discussions this page draws on

06

Go deeper

Learn guides on THCFarmer

07

Common questions

Is the CANNA Coco amount for each part?

Yes. Use equal amounts of A and B. The amount shown is for each part, so 10 mL per gallon means 10 mL of A and 10 mL of B. Add A, stir, then add B.

Do I need a separate bloom nutrient with CANNA Coco?

No. CANNA Coco is one mix for growth and flower. Add PK 13/14 for one week mid-flower if you want, as the chart shows.

Do I need cal-mag with CANNA Coco?

CANNA designs Coco A and B as a complete feed. Members on RO or filtered water often add cal-mag to bring the water to about 0.4 EC before the base nutrients.

Still not sure? Ask the growers.

Post your nutrients, how much you're feeding, your medium and a photo. Members who've run CANNA Coco will tell you what they'd change.

08

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09

More grow tools

These numbers are starting points, not rules. Strains, water, medium and light all change what a plant wants, so watch your plants and adjust.

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