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Biobizz feeding schedule and calculator

Biobizz's official 2026 feeding schedule for its own substrates, scaled to the water you're mixing. Biobizz writes it per liter; the table shows mL per US gallon.

Checked Oct 20, 2026 Source: Biobizz Nutrient Schedule 2026 (biobizz.com, per liter of water)
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

Grams or mL per gallon of water, as marked, at full strength

Light·Mix or Coco·Mix

Stage Bio·Grow Bio·Bloom Root·Juice Microbes Top·Max Bio·Heaven Acti·Vera Alg·A·Mic
Propagation 7.6 mL 15.1 mL 1.51 g 7.6 mL 7.6 mL
Veg (as long as you need) 7.6 mL 15.1 mL 1.51 g 7.6 mL 7.6 mL 7.6 mL
Flower week 1 11.4 mL 7.6 mL 7.6 mL 0.76 g 3.8 mL 7.6 mL 11.4 mL 7.6 mL
Flower week 2 15.1 mL 11.4 mL 7.6 mL 0.76 g 7.6 mL 11.4 mL 15.1 mL 7.6 mL
Flower week 3 15.1 mL 11.4 mL 1.51 g 7.6 mL 15.1 mL 18.9 mL 11.4 mL
Flower week 4 15.1 mL 15.1 mL 1.51 g 11.4 mL 18.9 mL 18.9 mL 11.4 mL
Flower week 5 7.6 mL 15.1 mL 1.51 g 11.4 mL 18.9 mL 11.4 mL 15.1 mL
Flower week 6 7.6 mL 15.1 mL 0.76 g 15.1 mL 11.4 mL 11.4 mL 15.1 mL
Flower week 7 7.6 mL 11.4 mL 0.76 g 15.1 mL 11.4 mL 7.6 mL 11.4 mL
Flower week 8 3.8 mL 11.4 mL 0.76 g 3.8 mL 7.6 mL 3.8 mL 7.6 mL
Flower week 9 (plain water, harvest in week 10)

All·Mix (pre-fertilized)

Biobizz: All·Mix arrives pre-fertilized, so it needs a lighter hand.

Stage Bio·Grow Bio·Bloom Root·Juice Microbes Top·Max Bio·Heaven Acti·Vera
Propagation 7.6 mL 15.1 mL 1.51 g 7.6 mL 7.6 mL
Veg (as long as you need) 7.6 mL 15.1 mL 1.51 g 7.6 mL 7.6 mL
Flower week 1 11.4 mL 3.8 mL 7.6 mL 0.76 g 3.8 mL 7.6 mL 11.4 mL
Flower week 2 7.6 mL 7.6 mL 7.6 mL 0.76 g 7.6 mL 11.4 mL 15.1 mL
Flower week 3 7.6 mL 11.4 mL 1.51 g 7.6 mL 15.1 mL 18.9 mL
Flower week 4 7.6 mL 11.4 mL 1.51 g 11.4 mL 18.9 mL 18.9 mL
Flower week 5 7.6 mL 11.4 mL 1.51 g 11.4 mL 18.9 mL 11.4 mL
Flower week 6 7.6 mL 15.1 mL 0.76 g 15.1 mL 15.1 mL 11.4 mL
Flower week 7 7.6 mL 15.1 mL 0.76 g 15.1 mL 15.1 mL 7.6 mL
Flower week 8 3.8 mL 15.1 mL 0.76 g 15.1 mL 11.4 mL 3.8 mL
Flower week 9 (plain water, harvest in week 10)
03

Notes from the chart

  • Converted from Biobizz's per-liter chart at 3.785 liters per US gallon (1 mL per liter = 3.8 mL per gallon). Microbes is a powder, in grams.
  • Microbes: Biobizz says to apply once a week, twice a week when nutrient demand is high. Don't add it to every watering.
  • Veg can run as long as you need it to. Start counting flower weeks from the day you flip.
  • Fish·Mix does the same job as Bio·Grow: run one or the other, and switch to Bio·Grow to trigger flowering.
  • Biobizz: it's always better to be modest than to add more.

Source: Biobizz Nutrient Schedule 2026 (biobizz.com, per liter of water)

04

What growers here actually run

From the THCFarmer archive

  • Ran Bio·Bloom at only 550 to 600 PPM for most of the grow, topping out at 800, in both soil and coco. The results matched their Heavy 16 run in coco.

    MakinGoo Read the post →

  • Uses Biobizz Light·Mix straight out of the bag for seedlings and fresh clones, with no feeding yet and no burn.

    JWM2 Read the post →

  • Runs Biobizz in soil and finds most plants charge on with it. Keeps it simple; the odd plant needs a pH adjustment.

    Mr Bee Read the post →

  • Started an auto at 1 mL per liter each of Root·Juice and Bio·Grow and raised the dose slowly from there.

    Ooopsi Read the post →
05

Threads worth reading

Discussions this page draws on

06

Go deeper

Learn guides on THCFarmer

07

Common questions

All·Mix or Light·Mix?

Biobizz says All·Mix arrives pre-fertilized, so it needs a lighter hand than Light·Mix or Coco·Mix. The two charts differ week by week, and only the Light·Mix and Coco·Mix chart uses Alg·A·Mic. Pick the version that matches your substrate.

Bio·Grow or Fish·Mix?

Biobizz says they do the same job, so run one or the other, not both. Fish·Mix can replace Bio·Grow in veg at the same dose, but switch back to Bio·Grow when you want to trigger flowering. The calculator shows Bio·Grow.

Why are the amounts per gallon odd numbers?

Biobizz publishes its chart per liter. We converted it at 3.785 liters per US gallon, so 1 mL per liter shows as 3.8 mL per gallon. Switch the calculator to liters to see Biobizz's own numbers.

Does Biobizz say to flush?

Biobizz's chart ends with a week of plain water (flower week 9) before harvest in week 10.

Still not sure? Ask the growers.

Post your nutrients, how much you're feeding, your medium and a photo. Members who've run Biobizz 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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