Grodan Gro Block Improved GR10

The advanced wetting technology is designed to ensure the stone wool absorbs and distributes water and nutrients more evenly throughout the entire block. This eliminates dry spots and makes it significantly easier to maintain consistent moisture levels for your plants.

These 4-inch blocks are best used for transplanting seedlings or cuttings that have already developed a root system. The pre-drilled hole is specifically sized to accommodate a smaller starter plug, making the transition into the larger block seamless.

While Grodan blocks are ready to use, it is standard practice to soak them in a pH-adjusted nutrient solution before transplanting. This ensures the substrate is fully saturated and the pH is stabilized for your specific crop.

These blocks are designed for single-use cultivation. Reusing them can lead to root rot, pathogen buildup, and structural degradation of the stone wool fibers, which may compromise the health of your next crop.

Stone wool can release fine dust particles that may cause skin, eye, or respiratory irritation. It is recommended to wear gloves and a dust mask when handling dry blocks to avoid discomfort.

Yes, these blocks are highly versatile and work well with most hydroponic setups, including drip irrigation, ebb and flow, and deep water culture systems. Their uniform structure ensures they maintain their shape and integrity regardless of the irrigation method.