Don't settle for potting mix which is full of nasties, choose the best plant grow medium for your hydroponic garden. Best hydroponic substrates, Growool, Rockwool, Coco and Coco Blends, Perlite, Vermiculite, Soil conditioner, Root enhancer, Natural earth minerals, Living Soils, Clay Pebbles.

Clay Pellets and Pebbles are probably the most popular mediums used in hydroponic growing. Clay pebbles are usually used with rockwool and starter cubes, and all you have to do is fill a small basket full of pebbles, set your rooted plant down in them (with or without a cube or cell), and let your nutrient-water flow.

It's a great option for people with little or no gardening space, or who want to grow herbs and vegetables through the winter. Hydroponic gardening is space-efficient and takes less water than gardening in soil. Growing in water also means no weeds.