Rockwool / Stonewool (A-Ok Starter Cubes / Plugs)

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HYDROPONICS Grow Media -Size 1"x1" Rockwool / Stonewool ( 200 cubes / pack) Product Details:   The renewed starter grow plugs result in a maximum number of usable and homogeneous seedlings.  Both form and strength have been substantially improved for good machine and manual processing.  Whether sowing or transplanting, the new plug is the solution to achieving homogeneous sowing.  Grodan A-Ok plugs...