DutchPro Hydro/Coco Grow A+B Soft Water

Vegetative-stage hydro/coco feed with added calcium and magnesium for RO or soft water

Unlike soil, hydro and coco substrates don't hold any background nutrition of their own, so DutchPro's Hydro/Coco range is formulated at a higher concentration than the Soil range — enough to avoid a deficiency when the substrate can't top the plant up itself. This Soft Water version is built for reverse-osmosis or very soft water (roughly under 150ppm), which doesn't carry the calcium and magnesium that ordinary tap water does, so DutchPro adds an extra boost of both; if you're feeding with hard or ordinary UK tap water, use Hydro/Coco Grow A+B Hard Water instead, which doesn't need the extra boost.

The Grow half of this two-part system is balanced for the vegetative stage — building strong stems, leaves and root structure before the plant switches to flowering. Pair it with Hydro/Coco Bloom A+B Soft Water, which shifts the balance toward phosphorus and potassium once flowering begins.