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GH FloraNova feeding schedule and calculator

General Hydroponics' official FloraNova 1-part weekly feedchart in all three strengths, scaled to the water you're mixing. One bottle in grow, one in bloom.

Checked Oct 20, 2026 Source: General Hydroponics FloraNova Professional 1-Part Weekly Feedchart (USD, code 201124)
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

Light feed

GH suggests the light feed for frequent irrigation, small pots and sea of green.

Stage FloraNova Grow FloraNova Bloom EC
Grow week 1 (seedling or clone) 1.8 0.5–0.7
Grow week 2 (early growth) 3.5 0.9–1.2
Grow week 3 (early growth) 4.2 1.2–1.5
Grow week 4 (late growth) 5.3 1.5–1.8
Bloom week 1 (early bloom) 5.3 1.5–1.8
Bloom week 2 (early bloom) 5.3 1.5–1.8
Bloom week 3 (mid bloom) 4.4 1.2–1.5
Bloom week 4 (mid bloom) 4.4 1.2–1.5
Bloom week 5 (mid bloom) 4.4 1.2–1.5
Bloom week 6 (late bloom) 3.5 1.0–1.3
Bloom week 7 (late bloom) 3.5 1.0–1.3
Bloom week 8 (ripen) 3 0.8–1.0
Bloom week 9 (flush)

Medium feed

GH suggests the medium feed for one to five irrigations a day and topped plants in #2 to #5 pots.

Stage FloraNova Grow FloraNova Bloom EC
Grow week 1 (seedling or clone) 2 0.6–0.8
Grow week 2 (early growth) 4 1.2–1.5
Grow week 3 (early growth) 4.8 1.5–1.8
Grow week 4 (late growth) 6 1.8–2.1
Bloom week 1 (early bloom) 6 1.8–2.1
Bloom week 2 (early bloom) 6 1.8–2.1
Bloom week 3 (mid bloom) 5 1.5–1.8
Bloom week 4 (mid bloom) 5 1.5–1.8
Bloom week 5 (mid bloom) 5 1.5–1.8
Bloom week 6 (late bloom) 4 1.1–1.4
Bloom week 7 (late bloom) 4 1.1–1.4
Bloom week 8 (ripen) 3.5 1.0–1.2
Bloom week 9 (flush)

Aggressive feed

GH suggests the aggressive feed for large, multi-topped plants watered once a day or less.

Stage FloraNova Grow FloraNova Bloom EC
Grow week 1 (seedling or clone) 2.5 0.8–1.0
Grow week 2 (early growth) 5 1.5–1.8
Grow week 3 (early growth) 6 1.8–2.1
Grow week 4 (late growth) 7.5 2.2–2.5
Bloom week 1 (early bloom) 7.5 2.1–2.4
Bloom week 2 (early bloom) 7.5 2.1–2.4
Bloom week 3 (mid bloom) 6.3 1.8–2.1
Bloom week 4 (mid bloom) 6.3 1.8–2.1
Bloom week 5 (mid bloom) 6.3 1.8–2.1
Bloom week 6 (late bloom) 5 1.4–1.7
Bloom week 7 (late bloom) 5 1.4–1.7
Bloom week 8 (ripen) 4.2 1.2–1.4
Bloom week 9 (flush)
03

Notes from the chart

  • Amounts are mL per US gallon (3.79 liters). EC targets are for the nutrients; PPM on GH's chart uses the 500 scale.
  • Feeding charts are recommendations only. GH notes adjustments may be needed for your environment and setup.

Source: General Hydroponics FloraNova Professional 1-Part Weekly Feedchart (USD, code 201124)

05

Threads worth reading

Discussions this page draws on

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Go deeper

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07

Common questions

Which feed strength should I use?

GH matches strength to how often you water and how big your plants are. Light is for frequent irrigation, small pots and sea of green. Aggressive is for big, topped plants watered once a day or less. If you're unsure, start light.

Shake FloraNova first?

Yes. FloraNova is a concentrated suspension and settles in the bottle, so shake it well before measuring.

Still not sure? Ask the growers.

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

08

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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.

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