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Athena Blended feeding schedule and calculator

Athena's official Blended Line schedule, with or without Fade, scaled to the water you're mixing. A and B parts each get the amount shown.

Checked Oct 20, 2026 Source: Athena Blended Program with and without Fade, Imperial (A01.004)
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

Blended with Fade

Weeks 8 and 9 drop Bloom A and B and use Fade with PK.

Stage Grow A Grow B Bloom A Bloom B Fade PK CaMg Cleanse EC
Clone pre-soak 5 5 1 0.9
Clone feed 10 10 1 1.7
Veg week 1 11 11 3–5 2–5 2.1
Veg week 2 11 11 3–5 2–5 2.1
Veg week 3 11 11 3–5 2–5 2.1
Veg week 4 11 11 3–5 2–5 2.1
Flower week 1 12 12 3–5 2–5 2.3
Flower week 2 12 12 3–5 2–5 2.3
Flower week 3 12 12 4 3–5 2–5 2.5
Flower week 4 12 12 6 3–5 2–5 2.6
Flower week 5 10 10 9 3–5 2–5 2.4
Flower week 6 9 9 10 3–5 2–5 2.3
Flower week 7 5 5 12 3–5 2–5 1.7
Flower week 8 12 12 2–5 1.7
Flower week 9 12 12 2–5 1.7

pH 5.8 to 6.4. Athena: 5.8 to 6.2 in coco and rockwool, 6.0 to 6.4 in peat-based mixes, 5.6 for clones, 6.0 to 6.4 in the last week.

Blended without Fade

Weeks 8 and 9 keep 4 mL of Bloom A and B with 10 mL PK.

Stage Grow A Grow B Bloom A Bloom B PK CaMg Cleanse EC
Clone pre-soak 5 5 1 0.9
Clone feed 10 10 1 1.7
Veg week 1 11 11 3–5 2–5 2.1
Veg week 2 11 11 3–5 2–5 2.1
Veg week 3 11 11 3–5 2–5 2.1
Veg week 4 11 11 3–5 2–5 2.1
Flower week 1 12 12 3–5 2–5 2.3
Flower week 2 12 12 3–5 2–5 2.3
Flower week 3 12 12 4 3–5 2–5 2.5
Flower week 4 12 12 6 3–5 2–5 2.6
Flower week 5 10 10 9 3–5 2–5 2.4
Flower week 6 9 9 10 3–5 2–5 2.3
Flower week 7 5 5 12 3–5 2–5 1.7
Flower week 8 4 4 10 2–5 1.5
Flower week 9 4 4 10 2–5 1.5

pH 5.8 to 6.4. Athena: 5.8 to 6.2 in coco and rockwool, 6.0 to 6.4 in peat-based mixes, 5.6 for clones, 6.0 to 6.4 in the last week.

03

Notes from the chart

  • All amounts are mL per gallon. Grow A and B, and Bloom A and B, each get the amount shown.
  • Balance is used as a pH up, not dosed. If you use Blended Balance, Athena says not to add another potassium silicate product.
  • Pre-soak media before planting: coco at pH 5.5 to 5.8 and EC 3.5 to 4.0, rockwool at pH 5.0 to 5.5 and EC 2.5 to 3.0.
  • Flush with RO water plus 10 mL Cleanse per gallon to under 0.1 EC: the last 3 days in coco, the last day in rockwool.
  • Athena calls this a baseline: adjust weeks to your run and strain.

Source: Athena Blended Program with and without Fade, Imperial (A01.004)

04

What growers here actually run

From the THCFarmer archive

  • Athena runs at a higher EC, so watering and drybacks matter. Thinks coco and perlite aren't ideal for it; it suits a zero-CEC medium like rockwool better.

    Dr.Green55 Read the post →

  • Feeds Athena at 1.0 EC while cleaning up lowers and taking clones in veg.

    MEGA956 Read the post →
05

Threads worth reading

Discussions this page draws on

06

Go deeper

Learn guides on THCFarmer

07

Common questions

Is the Athena Blended amount for each part?

Yes. Grow A and Grow B, and Bloom A and Bloom B, each get the amount shown.

With Fade or without?

Athena publishes both. With Fade, weeks 8 and 9 drop Bloom A and B and use Fade plus PK. Without Fade, weeks 8 and 9 keep a little Bloom A and B with PK. Use the switch at the top of the calculator.

What does CaMg 3-5 mean?

Athena gives a range of 3 to 5 mL per gallon for CaMg. Use the high end with RO or soft water, the low end with harder tap water.

Still not sure? Ask the growers.

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