Gro-Blocks™ are similar to a plant container. Need a 3 in pot? Then choose a 3 in Gro-Block™. Small plants can be fully grown in our larger Gro-Blocks™. Holes are perfect size for any 1.5 in starter plug.
— Ships separately from H: WA, CA, CO, MI, TN, PA, FL USA (No USPS).
For more information, please visit the manufacturer grodan's website.