HTG Supply Grodan Delta 6.5 4″ x 4″ x 2.5″ – Strip of 6

 Grodan's Delta 6.5 Gro Blocks Measure 4" x 4" x 2.5" - perfect for transplanting seedlings and cuttings. Once roots reach 1" long these 4" Gro Blocks can be used as a transplant for starter blocks. Grodan A-OK Staters and Macroplugs fit snugly into the pre-formed hole on the top of each 4" Gro Block. Designed to be transplanted into larger Gro-Blocks or Gro-Slabs.     Block Size: 4" x 4" x 2.5"    Contents: Rockwool mineral fibers    Strip of 6 gro-blocks OverviewGrodan Delta 6.5 4″ x 4″ x 2.5″ – Strip of 6 Grodan Delta blocks are the most uniform blocks available on the market. They feature improved grooves at the base to promote better drainage. They are available in a large assortment of sizes and configurations to suit all types of plants. These growing blocks are used for direct sowing or “blocking on” of Macro and Multiblock raised plants. AO 36/40 plugs fit well into the hole sizes provided by the blocks. The blocks can then be placed on top of a slab to provide for a larger gr