Grodan Gro Block Improved GR6.5 Small 4" w/Hole 4" x 4" x 2.6" Strip Gardening Accessories With an ideal N-P-K ratio

With an ideal N-P-K ratio of 7-9-5

a barrier should be used like HiFloat or Polyvinyl alcohol

the determination of nitrite in meat products

Soluble Potash (K₂O): 4

Grodan Gro Block Improved GR6.5 Small 4" w/Hole 4" x 4" x 2.6" Strip Gardening Accessories With an ideal N-P-K ratioDescription Product Details: Grodan Improved Gro Block Improved GR6. 5 Small 4" withHole, 4" x 4" x 2. 6" Strip Grodan 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 Grodan's Advanced Wetting