Growing Media
Growing media for indoor and greenhouse growing: premium soils from Biobizz, Canna and Plagron, coco coir, clay pebbles, rockwool slabs, and the perlite, vermiculite and worm humus to improve any of them.
In StockUgro
£17.06
In StockBiobizz
£22.46
In StockCanna
£13.46
In StockBiobizz
£11.66
In StockGold Label
£14.81
In StockJiffy
Jiffy Pro7 70/30 Coco Perlite Mix - 50L
£13.46
In StockPlagron
£11.66
In StockCanna
£15.26
In StockCanna
£11.66
In StockGold Label
£14.40
In StockPlagron
£14.36
In StockEcothrive
£5.36
In StockCanna
£9.86
In StockCultilene
£4.73
In StockBiobizz
£11.66
In StockPLANT!T
£10.76
In StockPLANT!T
£13.01
Pre-OrderJiffy
Jiffy Pro7 Coco 100% Coir - 50L
£13.46
Pre-OrderBiobizz
£13.46
Pre-OrderJiffy
£11.66
About Growing Media
Choosing a medium
Soil is the most forgiving: it buffers feeding mistakes and needs watering least often, and it suits organic feeds. Coco is inert and light, drains and re-wets easily and gives faster growth, but it must be fed at every watering with a coco nutrient and CalMag. Clay pebbles are for hydroponic systems, where water and feed are pumped through; they hold nothing themselves. Rockwool is the greenhouse standard for drip systems and propagation, sterile and consistent.
Improving a mix
Perlite opens a heavy mix; vermiculite holds water in a light one. Worm humus and Pre-Mix feed a soil for weeks. Most growers settle on soil or coco with 20 to 30 per cent perlite. The sections below cover each medium, and the shop will happily talk through which suits your setup.
Growers' Guides
- Which Potting Soil? Biobizz, Canna Terra, Plagron and Gold LabelBiobizz All Mix vs Light Mix, Canna Terra Professional vs Plus, Plagron Batmix and Gold Label compared: how much food each soil carries and when to feed.
- Soil Amendments and Living Soil: Worm Castings, Frass, Pre-MixSoil amendments for living soil: what worm castings, insect frass, Biobizz Pre-Mix and mycorrhizae do, which soils already have them and when to add each.
- Hydroponics and Growing Terms Explained: A Growers' GlossaryHydroponics and growing terms explained in plain English, from EC, pH and PPFD to VPD, NFT and run-to-waste, with links to our full guides.
- Perlite vs Vermiculite: What They Are and When to Use EachWhat perlite and vermiculite are, how they differ, which to use for seeds, cuttings, soil and coco, and the soils and mixes we sell with perlite in them.
- Clay Pebbles and Rockwool Cubes: How to Use Them in HydroponicsWhat clay pebbles and rockwool are, how to rinse, soak and plant in them, which hydroponic systems each suits, and how they compare with coco.
- Coco Coir Guide: Choosing, Feeding and Reusing CocoWhat coco coir is, the coco mixes worth buying, how it compares with clay pebbles and rockwool, and how to feed and reuse it.
- Canna Coco Feed Chart & Grow Guide: A & B, Additives, EC by WeekThe CANNA COCO feed chart and Canna grow guide: a week-by-week grow chart for A & B, Rhizotonic, CANNAZYM, CANNABOOST and PK 13/14, and the EC to aim for.