Pay in 4 interest-free payments of $6.93 Learn more
Ships within 48 hours · Estimated delivery Sep 2 - Sep 7
Granulated rockwool as potting mix: When you use granulated rockwool to pot up your plants
a 1 inch gap or greater must be present between the top of the fixture and the surface it is mounted under to enable adequate air flow
The lamp will take longer to cool down since it has two layers of glass
With this design
Rich Humic Options:Rich Humic (Humic Acid) 1gal Granulated rockwool as potting mix:Humic acid is a naturally occurring material found in soils, lignite and composting vegetable matter. Rich Humic lab results show 22% humic acid through the alkaline extraction method and 3% humic acid through the acid insoluble method. Because some states recognize only the acid insoluble method, we list Rich Humic at 3% humic acid.