Hortifiber Rockwool® Propagation BlocksOnce seedlings have developed in the propagation cubes, the entire cube can then be transferred to these propagation blocks. Propagation blocks have a hole in the center that will accept the 1 1/2" propagation cubes. The 3" blocks are sold in strips of 8. The 4" blocks are sold in strips of 6. Larger quantities and sizes available. Hortifiber Rockwool® is a registered trademark of Thermafiber, Inc. |
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