Rockwool, a lightweight hydroponic substrate is made from spinning molten basaltic rock into fine fibers which are then formed into a range of cubes, blocks, growing slabs and granular products.
Benefits And Drawbacks Of Rockwool For Plants
Coco coir or rockwool substrate in the horticulture industry
Rockwool as a substrate for plants
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Soilless Culture Substrate Plant Propagation Seedling Block - Temu
Rockwool as a substrate for plants
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Factors to consider when choosing a substrate for lettuce
Grodan rockwool substrates offer growers more control – Hort Americas