Mills Basis A&B 5L set, Part A and Part B two-part base nutrient
Mills Basis A 1L bottle, 3-0-1 two-part base nutrient
Mills Basis B 1L bottle, 0-4-3 two-part base nutrient
Mills Basis A 5L drum, two-part base nutrient
Mills Basis B 5L drum, two-part base nutrient
Mills Basis A&B 20L set, Part A and Part B drums
Mills Basis A 20L drum, two-part base nutrient
Mills Basis B 20L drum, two-part base nutrient
Mills Basis A&B 5L set, Part A and Part B two-part base nutrient
Mills Basis A 1L bottle, 3-0-1 two-part base nutrient
Mills Basis B 1L bottle, 0-4-3 two-part base nutrient
Mills Basis A 5L drum, two-part base nutrient
Mills Basis B 5L drum, two-part base nutrient
Mills Basis A&B 20L set, Part A and Part B drums
Mills Basis A 20L drum, two-part base nutrient
Mills Basis B 20L drum, two-part base nutrient

Basis A&B by Mills Nutrients — Two-Part Base Nutrient for Hydro, Coco & Soil

MN-NUT-BASIS-5L

$119.95
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Dutch two-part base nutrient fed in equal parts from veg to harvest. Works in hydro, coco and soil, and anchors the whole Mills feeding program.

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Pairs well with

Basis A&B is the two-part base nutrient the whole Mills range is built on. Part A and Part B go in at equal doses every feed, from the first week of growth to the last week of bloom, and carry the macro and micro elements your plants need in one balanced ratio. It runs in hydro, coco and soil, Mills publishes feed charts for both tap water and RO water, and it is designed, made and bottled in Holland. On its own it is a complete base feed. Add Start-R, C4, Ultimate PK and Vitalize when you want to steer each stage of the crop.

One base, start to finishSame two bottles at equal doses for the whole run. Only the dose changes, so there is no swapping between a grow base and a bloom base halfway through.
Charts for tap and RO waterMills gives separate doses for tap water (EC 0.7) and RO water (EC 0.0), so you feed for the water you actually have instead of guessing.
A target EC for every weekThe chart sets an EC range for each week, from 1.3 to 1.5 in week one up to 2.6 to 2.8 at peak bloom. Your meter tells you straight away if you are on track.
Hydro, coco or soilTested by Mills across all three, so one base covers a DWC bucket, a coco run-to-waste setup or a soil pot.
The anchor of a five-part programStart-R, C4, Ultimate PK and Vitalize each slot in at set weeks around Basis. The whole program fits on one chart, with no guessing what goes with what.
Tent to grow roomSold as matched A&B sets in 1L, 5L and 20L, so you buy one set and never end up with a spare Part A and no Part B.

Specifications
Brand: Mills Nutrients
Product: Basis A&B two-part base nutrient
Format: Liquid concentrate, Part A + Part B
Sizes: 1L, 5L and 20L sets (A and B)
Basis A: Calcium and chelated iron with other macro and micro elements
Basis A NPK: 3-0-1
Basis B NPK: 0-4-3
Use: Every feed, growth and bloom
Ratio: Equal doses of A and B
Dose: 1ml to 5.5ml each of A and B per litre, by week and water
Target pH: 5.5 to 6.5
Growing media: Hydro, coco and soil
Water: Tap or RO (separate charts)
Made in: Holland

Grower's Tip
  • Never pour Part A and Part B into the same jug neat. Mixed as concentrates they lock each other out. Add each one to the water and stir before the next.
  • Read your tap water EC before you start. Mills built the tap chart on water at EC 0.7, so if yours is well off that, use the Mills nutrient calculator instead of the chart.
  • RO growers dose more than tap growers on the same week because RO water carries no background minerals. Follow the RO chart, not the tap one.
  • Treat the ml figures as your starting point and the EC range as the target. Mix, meter, then tweak.
  • Feed strength peaks around bloom weeks 4 to 6, then Mills eases it back for the finish. Do not keep pushing EC up in the last weeks.
  • Shake both bottles before measuring. A 20L drum that has sat in the shed for a month needs a proper roll first.

How To Mix It
1Fill your reservoir or watering can with water first.
2If you run Vitalize, add it first and stir well.
3Add Basis A at the dose for this week and stir thoroughly.
4Add the same amount of Basis B and stir thoroughly again.
5Add any stage additive (Start-R, C4 or Ultimate PK) one at a time, stirring between each.
6Check EC against the chart below, then adjust pH to 5.5 to 6.5.

Mills feed chart: tap water (EC 0.7)

ml per litre G1 G2 B1 B2 B3 B4 B5 B6 B7 B8 B9
Vitalize 0.2 0.2 0.2 0.2 0.2 0.2 0.1 0.1 - - -
Basis A and B (each) 1 1 2 2.5 3.5 4 3.5 3.5 3 3 2
Start-R 1 2 1 1 - - - - - - -
C4 - - - 0.5 1 1.5 1.5 1.5 - - -
Ultimate PK - - - - - - 2 2 2.5 2.5 2
Target EC 1.3–1.5 1.7–1.9 1.9–2.1 2.1–2.3 2.3–2.5 2.5–2.7 2.6–2.8 2.6–2.8 2.4–2.6 2.4–2.6 1.8–2.0

Mills feed chart: RO water (EC 0.0)

ml per litre G1 G2 B1 B2 B3 B4 B5 B6 B7 B8 B9
Vitalize 0.2 0.2 0.2 0.2 0.2 0.2 0.1 0.1 - - -
Basis A and B (each) 2.5 2.5 4 4 5 5.5 5 5 4.5 4.5 3.5
Start-R 1 2 1.5 1.5 - - - - - - -
C4 - - - 1 2 2 2 2 - - -
Ultimate PK - - - - - - 2 2 3.5 3.5 2
Target EC 1.3–1.5 1.7–1.9 1.9–2.1 2.1–2.3 2.3–2.5 2.5–2.7 2.6–2.8 2.6–2.8 2.4–2.6 2.4–2.6 1.8–2.0

G = growth week, B = bloom week. Figures are from the Mills grow chart. Running a different schedule or water source? Plug your numbers into the Mills nutrient calculator.

Pairs Well With

Frequently Asked Questions
Do I use the same Basis A&B in veg and bloom?

Yes. Basis A&B is used for the whole crop cycle at equal doses of A and B. Only the dose changes from week to week.

Can I use Basis A&B with tap water?

Yes. Mills builds its tap water chart on water at EC 0.7 and publishes a separate chart for RO water at EC 0.0. If your tap water sits well away from 0.7, use the Mills nutrient calculator.

Is there a separate hard water or soft water version?

No. The Basis A&B we stock is one formula. What changes is the dose, which you set from the tap or RO chart to suit the water you start with.

Does Basis A&B work in soil and coco?

Yes. Mills has tested Basis A&B in hydro, coco and soil, and the same chart applies across all three.

Do I need the other Mills additives?

No. Basis A&B carries the macro and micro elements on its own. Start-R, C4, Ultimate PK and Vitalize are there when you want to push each stage harder.

Can I premix Part A and Part B in a jug?

No. Mills is clear on this: add each part to water separately and stir between them. Mixing the concentrates together locks nutrients up before they ever reach the tank.

What pH should I run with Mills?

Mills recommends adjusting the finished nutrient solution to pH 5.5 to 6.5. Adjust pH last, after every product is in.

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Build your feed on Basis A&B

Two parts, one ratio, every week of the run. Free shipping over $499*.

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