Whats so good about rockwool?
Rockwool is considered by many commercial growers and their consultants to be the ideal substrate for hydroponic production. Since it is inert, fertilization can be controlled in a very exact manner. Because of its unique structure, rockwool can hold water and retain sufficient air space to promote optimum root growth. Since rockwool exhibits a slow, steady drainage profile, the crop can be manipulated more precisely between vegetative and generative growth without fear of drastic changes in EC or pH. End result: better yields and higher quality.
