The substrate is the foundation your roots grow in, and it decides how you water and feed. This collection covers the three main options: soil, with BioBizz All-Mix and Light-Mix, the BioBizz Pre Mix soil improver and Monster Living Soil; coco, with the Supreme Coco Brick XL 50 L; and stone wool, with the Agra-Wool RFX-1 Earthwool foam mix. Soil is forgiving and suits organic feeding, coco dries faster and gives you more control, and stone wool is used for precise hydro-style feeding. Pick your nutrients to match. Browse soil & soil mixes, coco substrates or living soil & organic substrates.
Questions & answers about Substrates
All growing questions →- Medium & pots Soil, coco or hydro: what should a beginner start with? Soil is the most forgiving. Coco grows faster but needs feeding and pH checks every watering. Hydro is the most demanding. Read the answer →
- Medium & pots What's the best soil mix for growing indoors? Go for a light, airy, pre-fertilised mix with roughly 20–30% perlite so water drains and roots get air. Garden soil is a bad idea indoors... Read the answer →
- Medium & pots How often should I water in soil and in coco? Soil: water when the pot feels light and the top 2–3 cm are dry. Coco: water small amounts often, daily or every second day in bigger pla... Read the answer →
- Medium & pots Can I reuse my soil after a harvest? Yes, if the last plants were healthy. Break out the roots, mix in fresh compost or amendments, and let it rest before planting again. Thr... Read the answer →
