Mini block Grodan stone wool starting block 4 x 4 cm suitable for culture blocks with a large hole (Grodan stone wool block 10x10x6.5cm hole 40mm and Grodan Delta 4 culture block 7.5x7.5x6.5cm hole 40/35). Can also be used directly as a culture block.
Growing plants on Grodan blocks is child's play, the blocks fit together perfectly. The Grodan Single Block System (SBS) and the AO propagation blocks fit into all available culture blocks. Please always select the correct hole size (27 or 40 mm). The culture blocks are then placed either on mats, in other substrates or directly in the cultivation system (e.g. ebb and flow table or NFT system). (15 mini blocks MM 40/40 = 1 skein = 150 skeins/box)
Contents: 1 piece of Grodan mini block 40/40
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