Which grow medium do you recommend?

We were one of the first companies to recommend coco coir for growers, and we do think it delivers excellent results. We have 4 different formulas to choose from – Cocogro, Readygro Aeration, Readygro Moisture and Slacker. Of course you can always use the standard inert mediums if you prefer them, like rockwool, clay pellets, perlite, volcanic rock, etc.