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Ships within 48 hours · Estimated delivery Sep 10 - Sep 15
Tumbler Diameter: 9" | 23cm
600-watt load on 240V
Cards and wrappers are what a retail pack pays for
single-operator design
Grodan Gro-Block Improved GR6.5 Small 4'' (4''x4''x2.6'') | Case of 216 unwrapped Biosafe Systems Tumbler Diameter: 9" | 23cmGrodan Gro Block Improved 4x4 for Precision Growing These stone wool blocks feature advanced wetting technology for even water content and EC throughout the entire substrate, enabling faster rooting in and consistent plant development. The optimized fiber structure supports stronger roots that fully explore the block, improving water and nutrient uptake while reducing overall inputs. Backed by collaboration with Wageningen University & Research and
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