RedRock Grow Block

The RedRock Grow Block is a clay aggregate substrate engineered for control, consistency, and clean performance. Fired at over 2000°F, each 6in block provides a sterile, pH-neutral environment that offers exceptional porosity and drainage. It resists compaction and promotes robust root development and continuous oxygen flow — making it ideal for hydro systems. Each block is dusted and rinsed to ensure consistent EC levels and optimal nutrient uptake from the start. With a size that makes them easy to handle and transplant, they’re reusable for multiple runs — meaning they’re ideal for growers who want to streamline operation costs, improve consistency, and boost efficiency in high-performance setups. Consider starting your grow with the reliable RedRock Starter Block — made for supporting seeds and clones during early-stage growth. For larger setups, check out the RedRock Grow Slab — delivering consistent performance from veg to harvest.