Used by professionals in Australia, Canada, Caribbean, Europe, New Zealand & U.S. Now available to the home gardener.
For starting seeds, rooting cuttings & growing plants, this media is sterile, lightweight & has a great air to moisture ratio for superior growth. Seeds & cuttings rooted in rockwool may be inserted into larger rockwool blocks & slabs. They may also be planted directly into soilless or soil mediums.
The following flats & sizes fit the standard 10x20 plastic propagation trays; 1" -200 each, 1.5" -98 each , 2" - 50 each , & the 17"x9" slab.
Except for the flats of cubes, all sides of the cubes &blocks are wrapped in a strong white plastic. The slabs are completely wrapped.
Blocks with holes have a 1.5" (40mm) hole that accepts the 1.5" cube.
Generally, the cubes are the first step and are used for propagation. When the roots emerge from the cubes, they are inserted into the larger blocks. Depending on the crop, the larger blocks are then placed onto slabs for long term growth of large plants.