Grodan Gro Block Improved GR6.5 Small 4" w/Hole, 4" x 4" x 2.6" Strip - Case of 216 spl_allstate 413 µS/cm conductivity standard that

413 µS/cm conductivity standard that is prepared against a NIST traceable potassium chloride solution

Foliar Spray: Add 5-15ml/gallon of water

including humic acid

Home Grower

Grodan Gro Block Improved GR6.5 Small 4" w/Hole, 4" x 4" x 2.6" Strip - Case of 216 spl_allstate 413 µS/cm conductivity standard thatGrodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone wool substrate and irrigation strategies for specialty crops. The result of months of scientific research and trials is Grodan Gro Blocks Improved with Grodans Advanced Wetting Agent. These leading edge blocks have the optimal fiber structure and physical properties for crop uniformity, more