Mills Nutrients

Our complete Mills Nutrients range

A complete feeding system in five bottles. That is the promise behind Mills Nutrients, an Amsterdam-based brand that has earned a loyal following among growers who want professional results without professional complexity. The secret lies in the bio-mineral approach: every formula blends mineral salts for immediate uptake with organic components that build substrate health and microbial life. At Plant & Flower, your Belgian grow shop since 2011, we stock the full Mills range as part of our nutrient selection — from Starter Pack to Pack XXL for commercial operations.

Dutch bio-mineral feeding for every method

Most nutrient brands force a choice between mineral and organic. Mills removes that decision entirely. By combining both in a single bottle, every product delivers fast availability from mineral salts alongside the substrate-building benefits of organic ingredients. Mineral components ensure plants never wait for nutrition, while organic chelates stabilise the feed solution and support the microbial ecosystem in the root zone. A concrete advantage: the Mills formula does not accumulate in the substrate, unlike purely synthetic feeds which can leave salt residues after several cycles.

Technical specifications of the 5-product system

• Basis A&B: complete mineral-organic base, combined NPK ~3-4-4, dosage 4-10 ml/L by phase
• Start-R: vegetative bio-stimulant NPK 5-0-0.5 with humic, fulvic acids and L-amino acids
• C4: early bloom booster NPK 0.5-7-5 for bud site formation
• Ultimate PK: Phosphite base (not traditional Phosphate), final weeks of flowering only
• Vitalize: highly bioavailable silicic acid, co-developed with Rexil Agro BV
• CalMag: calcium-magnesium correction for soft or reverse osmosis water
• Target pH: 5.8-6.2 for water after complete mixing
• Substrates: all (soil, coco, rockwool, DWC), same products — only dosages differ

Popular models by phase

The Mills Starter Pack is the ideal entry point: contains Basis A&B, Start-R, C4 and Ultimate PK in practical sizes for a first complete grow. During vegetative growth and the transition to bloom, Start-R 1 L drives root development and leafy growth. The backbone of the system remains Basis A&B 2 x 1 L, used from germination to harvest in equal parts.

In early flowering, C4 1 L accelerates bud site formation and flower development. For the final weeks, Ultimate PK 1 L delivers phosphorus in Phosphite form — a particularly bioavailable variant that supports the root system during peak flowering. Supplements Vitalize 250 ml (silicic acid, 0.25-0.5 ml/L continuously) and CalMag 1 L (soft or RO water) round out the programme. Established growers opt for the Pack XXL with the same products in larger volumes.

Dosing and usage

Basis A&B is dosed in equal parts: same amount of A and B in the reservoir. Add component A to the water first, stir, then component B. Additives follow in order: Start-R, C4 or Ultimate PK depending on the phase, then Vitalize and CalMag if needed. Measure EC after complete mixing and adjust pH between 5.8 and 6.2. Typical EC: 0.6 (start) → 1.0-1.2 (growth) → 1.6-2.0 (flowering peak). For coco cultivation, start at a lighter dose and increase gradually based on plant response.

FAQ - Frequently asked questions about Mills Nutrients

Order your Mills Nutrients at Plant & Flower for fast, discreet delivery anywhere in Belgium. Our team gladly advises on adapting the programme to your substrate and experience level.