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Emerald Harvest feeding schedule and calculator

Emerald Harvest's official 2-part and 3-part feed charts, scaled to the water you're mixing. Both run the same add-ons on the same schedule.

Checked Oct 20, 2026 Source: Emerald Harvest 2-Part and 3-Part Nutrient Series Feed Charts (mL/gal, FC-MLG-2006-1117)
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

Cali Pro 2-part

Always mix Cali Pro A with fresh water first, then add Cali Pro B.

Stage Cali Pro Grow A Cali Pro Grow B Cali Pro Bloom A Cali Pro Bloom B Emerald Goddess King Kola Honey Chome Root Wizard
Seedlings and cuttings 2 2
Transplants 3 3
Early vegetative 4 4 6 4 15
Late vegetative Emerald Harvest: to extend veg, repeat one or more late vegetative weeks. 5 5 6 4
Week 1 (transition) 5 5 6 4 4
Week 2 (early flowering) 5 5 8 8 8 15
Week 3 (early flowering) 5 5 8 8 8
Week 4 (mid flowering) 6 6 10 12 8
Week 5 (mid flowering) Emerald Harvest: to extend flowering, repeat one or more mid-flowering weeks. 6 6 10 12 8
Week 6 (late flowering) 6 6 10 8 8
Week 7 (late flowering) 6 6 10 8 8
Week 8 (ripening) 6 6 5 4 6
Week 9 (ripening) 1 1 6

pH 5.8 to 6.3. Emerald Harvest: ideal pH after mixing is 5.8 to 6.3.

Grow Micro Bloom 3-part

Always mix Micro with fresh water first, then add Grow and/or Bloom.

Stage Emerald Harvest Grow Emerald Harvest Micro Emerald Harvest Bloom Emerald Goddess King Kola Honey Chome Root Wizard
Seedlings and cuttings 2 2 2
Transplants 4 2 1
Early vegetative 6 3 2 6 4 15
Late vegetative Emerald Harvest: to extend veg, repeat one or more late vegetative weeks. 8 4 2 6 4
Week 1 (transition) 4 4 4 6 4 4
Week 2 (early flowering) 2 4 8 8 8 8 15
Week 3 (early flowering) 2 4 8 8 8 8
Week 4 (mid flowering) 2 5 10 10 12 8
Week 5 (mid flowering) Emerald Harvest: to extend flowering, repeat one or more mid-flowering weeks. 2 5 10 10 12 8
Week 6 (late flowering) 6 11 10 8 8
Week 7 (late flowering) 6 11 10 8 8
Week 8 (ripening) 4 11 5 4 6
Week 9 (ripening) 2 2 2 6

pH 5.8 to 6.3. Emerald Harvest: ideal pH after mixing is 5.8 to 6.3.

03

Notes from the chart

  • Amounts are mL per US gallon. Cali Pro A and B each get the amount shown.
  • Emerald Harvest says the chart suits all growing media in recirculating or drain-to-waste systems.
  • Fill the reservoir with water, then add nutrients. Don't premix concentrated nutrients.
  • Cal-Mag and Sturdy Stalk (not in the calculator): 2 to 5 mL per gallon when needed, on plain-water days only, and not in the same watering.
  • Ideal water temperature is 60 to 72°F (16 to 22°C).

Source: Emerald Harvest 2-Part and 3-Part Nutrient Series Feed Charts (mL/gal, FC-MLG-2006-1117)

04

What growers here actually run

From the THCFarmer archive

  • Prefers the Cali-Pro 2-part to the 3-part line and usually runs it at half strength or less of the chart.

    Deadstill Read the post →

  • Mixes the reservoir at about 1,200 PPM each Monday and tops it off with plain water through the week, so it's under 500 PPM by the end of the week.

    kushdaking Read the post →

  • Outdoors in supersoil, per 50 gallons of water: Cali Pro A and B at 200 mL, Emerald Goddess 200 mL, Honey Chome and Root Wizard 180 mL each, for 900 PPM at pH 6.5.

    GrowingGreen Read the post →
05

Threads worth reading

Discussions this page draws on

06

Go deeper

Learn guides on THCFarmer

07

Common questions

Cali Pro or Grow Micro Bloom?

Both are Emerald Harvest base lines with the same add-on schedule. Cali Pro is 2-part: A and B each get the amount shown. Grow Micro Bloom is 3-part, which lets you change the ratio yourself. Use the switch at the top of the calculator.

Do I need King Kola, Honey Chome and the rest?

No. The base carries the nutrition. Untick the add-ons in the calculator to see the base on its own.

What about Cal-Mag and Sturdy Stalk?

Emerald Harvest lists both at 2 to 5 mL per gallon when needed, from early veg through late flower, and recommends them on plain-water days only. Don't use Cal-Mag and Sturdy Stalk in the same watering.

Why does the calculator start at 75 percent?

Members here often run Emerald Harvest at half strength or less, and Emerald Harvest itself says to watch for stress on a more aggressive feeding program. 75 percent is a middle start. Drop it if you see burnt tips.

Still not sure? Ask the growers.

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

08

Other feeding schedules

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  • Advanced Nutrients AN Iguana Juice (OG Organics)

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  • Advanced Nutrients AN Jungle Juice

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  • General Hydroponics GH FloraPro Powders

    FloraPro Powders (Ca + Micros, Grow, Bloom, Late Bloom), Standard and High EC

  • General Hydroponics GH FloraNova

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  • General Hydroponics GH Maxi Series

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  • General Hydroponics GH BioThrive

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  • Greenleaf Nutrients Mega Crop

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  • Heavy 16 Heavy 16

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  • House & Garden House & Garden

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  • Jack's Nutrients Jack's 321

    Jack's 321: 5-12-26 Part A, 15-0-0 Part B and Epsom salt, with Clone, Bloom and Finish

  • Masterblend Masterblend

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  • All brands Every feeding schedule →
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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