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Feeding schedules and calculators

Official charts from the big nutrient brands, plus member methods, scaled to the water you're mixing. Most growers here run them at 50 to 75 percent of the bottle and work up only when the plants ask for more.

Checked Oct 20, 2026 Source: Manufacturer charts and member methods, linked on each page
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
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Pick your nutrients

27 schedules from 15 brands

Show

Advanced Nutrients 6

Athena 2

Biobizz 1

Botanicare 1

CANNA 2

Emerald Harvest 1

FloraFlex 1

FoxFarm 1

Gaia Green 1

General Hydroponics 6

Greenleaf Nutrients 1

Heavy 16 1

House & Garden 1

Jack's Nutrients 1

Masterblend 1

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What growers here actually run

From the THCFarmer archive

  • Has run GH, Gaia Green, PureBlend Pro, FloraFlex and more. The fertilizer matters less than almost anything else, as long as it's used correctly and the environment, watering, EC and pH are dialed in.

    Dirtbag Read the post →

  • 35 years growing, 28 commercially. Runs bottled nutrients at three-quarter strength and keeps it simple.

    Lenny805 Read the post →

  • Three to four years in and still feeds at half strength.

    Goodshit97 Read the post →
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Threads worth reading

Discussions this page draws on

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Go deeper

Learn guides on THCFarmer

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Common questions

Why do growers here feed below the bottle?

Nutrient charts are written for ideal conditions and to move product. Members commonly start at 50 to 75 percent of the chart and raise it only when the plants show they want more. Burnt leaf tips are the first sign you've gone too far.

What does the strength setting in the calculators do?

It scales every amount on the chart. 50 percent gives half of each product. The EC you measure will drop by about the same proportion, plus whatever your plain water already reads.

Can I mix nutrient brands?

Pick one base nutrient line and stick with it. Base lines are balanced to work on their own. Adding another brand's additives is common, but add one thing at a time and check EC and pH after each.

Gallons or liters?

Every calculator works in either. The charts on these pages are shown per US gallon, the way most US brands publish them. One US gallon is 3.785 liters.

Still not sure? Ask the growers.

Don't see your nutrients? Post what you run, your medium and a photo, and the growers will help you build a schedule.

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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.

THCFarmer is not affiliated with any nutrient or equipment brand named on this page.

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