Grodan Gro-Blocks

Grodan Delta Stonewool Gro-Blocks

Grodan Gro-Blocks are cubes of stonewool (rockwool) that have a grooved base which promotes drainage to avoid root rot. Grodan stonewool is pH neutral, making it easy for you to maintain the ideal hydroponics reservoir pH value of 5.5 - 6.5. Each gro-block is wrapped in white plastic on all sides for shape stability. Grodan Delta Gro-Blocks have evenly distributed air pores that encourage your plants root growth throughout the entire block.