8 Block Strips. 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.
A core component of the "Precision Growing" philosophy, Grodan Gro-Blocks Improved with Advanced Wetting Technology allow you to cultivate more uniform and high-quality crops while using less water and nutrients.
The uniform distribution of water and nutrients throughout the block allows for more efficient use of the entire substrate volume. Full saturation of the blocks with no dry spots and improved EC control with less water is achieved in the rootzone due to the uniform, optimized wool resulting in a sustainable water and nutrient use. Improved “re-wettability” able to more easily increase water concentration in the substrate.