VidaWool Rockwool Block 40 with Hole, 4 Inch x 4 Inch x 2.5 Inch Type_Boveda Keep the warm air inside

Keep the warm air inside for the winter and protect your fan

ORGANIC MATTER (% BY WEIGHT): 95 - 98%

Salicylic acid is a naturally occurring acid which enhances resistance to drought

They don't need any activation or maintenance

VidaWool Rockwool Block 40 with Hole, 4 Inch x 4 Inch x 2.5 Inch Type_Boveda Keep the warm air insideVidaWool Product Documents VidaWool Rockwool Block Data Sheet VidaWool. Cultivate With Confidence VidaWool blocks provide the space and uniform water and nutrient distribution they need to continue thriving in their second stage of life. Equipped with a UV protection liner and Hydro Xtend water dispersion technology, VidaWool blocks are intelligently designed to deliver healthy, even root zones and consistent crop performance. Mineral wool growing