Grodan Rockwool Grow Blocks
Available in 2x2x1.5, 3x3x2.5, 3x3x4, 4x4x2.5, 4x4x3, 4x4x4, 6x6x6, and 8x8x8
Grodan Blocks -Grodan Delta blocks are the most uniform blocks available on the market. They feature improved grooves at the base to promote better drainage. These growing blocks are used for direct sowing or "blocking on" of Macro and Multiblock raised plants. Use for direct sowing tomato and cucumber sized plants.
Grodan has a tremendous capacity for absorbing nutrient solution while retaining plenty of oxygen for rapid plant growth