Grodan Rockwool STarter SheetsThese are smaller sized cubes that are primarily designed for Propagation. Whether you are starting seeds or cuttings these cubes will work great. The AO 36/40 and AO 50/40 cubes come in a 10" x 20" sheet that fits perfectly into standard 11" x 21" propagation trays. The MM 40/40 cubes are individually wrapped and come in strips of 15 cubes.
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