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. More.
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