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Gaia Green feeding schedule and calculator

The Gaia Green schedule THCFarmer member Shaded_One built and hundreds of members have run: amend or top dress in 4-week blocks, then just water. Enter your container size to get tablespoons.

Checked Oct 20, 2026 Source: "Growing with Gaia Green, Shaded's Method" by Shaded_One on THCFarmer (thread 140538)
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

Tablespoons per gallon of growing medium, at full strength

Full strength pushes plants hard. Shaded recommends starting at about two-thirds of these amounts (the calculator starts at 65 percent) and going to full only if your plants can handle it.

Stage Length All Purpose 4-4-4 Power Bloom 2-8-4
Sprout No nutrients. Worm castings and the cotyledons feed the seedling. About 1 week
Early veg (after transplant to 1 gallon) Amend (mix into the new medium) 4 weeks 3
Late veg (if needed) Top dress 4 weeks 3
Early flower (1 week before flip, at transplant to 5 gallon) Amend (mix into the new medium) 1 1/2 1 1/2
Mid flower (week 3 or 4 of flower) Top dress 3/4 2 1/4
Late flower (longer, sativa-leaning plants only) Light top dress 2

pH 6.0 to 7.0. THCFarmer's soil range. In living soil, watch the plants more than the pH pen.

03

Notes from the chart

  • Amounts are tablespoons per gallon of growing medium (container size), not per gallon of water.
  • Amend means mixing into fresh medium at transplant. Top dress means scratching it into the surface, then watering in.
  • Shaded also dusts mycorrhizae on the root ball at every transplant, and every 2 weeks adds about 1 tablespoon of Epsom salt, 1 tablespoon of gypsum and 2 tablespoons of a rock dust blend.

Source: "Growing with Gaia Green, Shaded's Method" by Shaded_One on THCFarmer (thread 140538)

04

What growers here actually run

From the THCFarmer archive

  • Top-dresses each 5-gallon outdoor bucket with 8 tablespoons of Gaia Green 4-4-4 and 14 of 2-8-4.

    Mikedin Read the post →

  • Up-potted veg plants into 2-gallon pots with Gaia All Purpose amended at half strength.

    BearWater Read the post →

  • Skips liquid nutrients: before the flip, top-dresses Gaia Green and worm castings, then gives plain pH'd water to the end.

    cannafarmer420 Read the post →
05

Threads worth reading

Discussions this page draws on

06

Go deeper

Learn guides on THCFarmer

07

Common questions

Why are the amounts in tablespoons per gallon of soil?

Gaia Green is a dry fertilizer mixed into or scratched onto the medium, so the amount depends on container size, not on how much water you use. Enter your pot size and the calculator gives tablespoons.

Can I use Gaia Green in coco or hydro?

This method is built for soil and soilless mixes with an active root zone. Dry organic amendments need microbes to break them down, so they don't suit inert coco or hydro.

Do I need to pH my water with Gaia Green?

It's a common question here (see the thread below). Many organic growers water in the low-to-mid 6s and let the soil buffer, and watch the plants rather than the pen.

Still not sure? Ask the growers.

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