The blocks are individually wrapped in UV resistant white plastic on four sides and supplied in convenient tear away strips. The base of the Growblocks are grooved to promote uniform and complete drainage preventing the occurrence of root rot. If the plant begins to become rootbound in one of these Growblocks you can either place the block right on top of a slab and let the plant root into the slab, or you can stack the cubes on top of each other. These Growblocks work excellent in all ebb and flow or drip hydroponic systems. All Growblocks are sold in packages containing strips of blocks which vary in the amount of blocks according to the size of the Growblock.
Slabs are the premium product for vegetable cropping.
They are available wrapped in UV resistant polyethylene sleeves for ease of use. The special structure provides a uniform environment allowing plant roots to rapidly explore all the available growing volume for a quick start. Water and nutrient distribution is also more uniform and provides a larger effective rooting volume than previously possible. The Slabs are easy to use just cut holes in the top of the slab set your cubes on top and cut a few slits in the bottom of the slab's plastic for drainage. Granulated Rockwool can be used alone in pots or as an amendment to organic based mixes.