NORTH SPORE Mastr Mix Sterile Soyhull & Hardwood Substrate, 5lb Add on Kits | Accessories slow-release fertilizer that provides a

slow-release fertilizer that provides a natural source of phosphorus and calcium to support strong root development

Innovative halo design produces uniform coverage and deeper light penetration to maximize plant yields

*Smart control reminder function alerts when to change Membranes & EZ-Twist Cartridges

Rich in Plant-Supporting Amino Acids

NORTH SPORE Mastr Mix Sterile Soyhull & Hardwood Substrate, 5lb Add on Kits | Accessories slow-release fertilizer that provides aNORTH SPORE Mastr Mix Sterile Soyhull & Hardwood Bulk Substrate The Premium 5lb sterilized Mastr Mix contains a blend of hardwood sawdust, non GMO soyhulls, and select substrate amendments. This proprietary blend is formulated for higher yields and has a pleasant, leafy, deep veggie aroma (thanks to the premium soyhulls used in our recipe). After more than a year of development, the result is a product with a better nutritional profile for a faster