Products from the Grodan Improved range are only available for purchase to licensed growers.
For germinating from seeds or cuttings, these are stable and self-supporting blocks.
When transplanting into a Grodan block, remove the wrapping before inserting it into the hole of the block. You can also remove the wrapping and place it directly on top of a Grodan slab.
If you do not have a license, you can always use Ref#120218 for your cultivation.