PURE SUBSTRATES Starter Block 4x4x2.5" (Case of 216)

Rockwool Starter Block with 42/40 Hole – 4x4x2.5"

Commercial grade grow blocks manufactured from high-grade US made raw material.

• Rockwool starter blocks are made especially for cannabis
• Wetting agent ensures nutrients are immediately plant available
• The high fiber density of the rockwool starter block makes better use of water and fertilizers while allowing better dry back
• Our rockwool starter blocks are priced for commercial cannabis production
• Sizes available for any style of growing
• Rockwool starter blocks are made in North America
• This product is used by the largest cannabis cultivators in North America

42/40 Hole - 10x10x6.5cm - 4-Inch x 4-Inch x 2.5-Inch

Case: 216 blocks

Pallet: 20 cases