You know it’s time to transplant to the Gro-Block when roots coming out of the starter are about 1” long.
Just place your Mini-Block on top of the 3” or 4” block without the hole, or your Macroplug/A-OK into the 3” or 4” block with the hole and watch your plant flourish.
- Gro-Blocks : Delta 4 Small 3"
- Sizes in inches : 3x3x2½
- Hole sizes available : No hole or Big hole
- Blocks/Package : 8
- Blocks/Case : 384
384 x Grodan GRO-BLOCKS DELTA 3'' UNWRAPPED
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