Growers Supply

Grodan Delta 4 Gro-Block™ w/Hole - Strip of 8

Item Number: 111387 Availability: Usually ships in 24 hours 
  • Order 48 or more at $6.19 /EA
  • Order 720 or more at $5.95 /EA

Achieve an optimum balance of oxygen to nutrients with Grodan Delta Gro-Blocks™ for rapid plant growth. A sustainable and environmentally friendly growing medium.

  • Manufactured from rockwool substrate, these Gro-Blocks™ are completely sterile, lightweight and easy to use. Unique hydrophilic fiber makes crop production easy to control by allowing efficient use of water and nutrients.
  • Ideal for direct sowing of our Grodan A-OK Starter Plugs, sold separately. When seedling roots coming out of plugs are 1” long, simply place plug in Gro-Block™ hole.
  • Delta 4 Blocks are ideal for use with small plants, such as strawberries and peppers. Sold in strips of 8 blocks.
  • Delta 6 Blocks are great for growing large fruiting crops, such as tomatoes and cucumbers, in our HydroCycle Dutch Buckets, sold separately. Sold in strips of 6 blocks.
  • Perfect for use in ebb and flo, Dutch bucket and drip hydroponic systems.
  • Priced per strip.