Redrock 4 inch Rockwool Cubes – 4" x 4" Stone Wool Starter Blocks with 42/40 Hole | 6-Pack | for Hydroponics & Indoor Growing | Includes Twin Canaries Chart

Description

🌱 Grow smarter, not harder — the pro’s choice for thriving roots!

Redrock 4 inch Rockwool Cubes are premium stone wool starter blocks crafted in the USA for hydroponic and indoor growing. Each 4x4x4 inch cube features a 42/40 hole pattern and high fiber density that enhances water and fertilizer efficiency while promoting healthy root aeration. Designed for commercial agriculture, these 6-pack blocks come with a Twin Canaries nutrient chart to optimize your growing strategy and maximize crop performance.