Grodan Improved GR10 (White Foil) 4" x 4" x 4" 1584 Blocks Loose on Mushroom Spawn Store These tri-clamp end caps:

These tri-clamp end caps:

Foliar: 10-20mL (2-4tsp)

NPK: 6-42-12

Hopper Bin Capacity: 13

Grodan Improved GR10 (White Foil) 4" x 4" x 4" 1584 Blocks Loose on Mushroom Spawn Store These tri-clamp end caps:Description Product Details: Grodan Improved GR10 (White Foil) 4" x 4" x 4" (1584 blocks Loose on Pallet) Grodan Improved GR10 (White Foil) 4" x 4" x 4" (1584 blocks Loose on Pallet): Grodan Improved Grodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone wool substrate and irrigation strategies for specialty crops. The result of months of