Dyna-Rok II Medium Grade 

Dyna-Gro Dyna-Rok II all purpose high silica growing medium is a natural, environmentally safe growing medium. 

Made from fossilized diatoms, Dyna-Rok II is a natural source of silica and other beneficial minerals. It's hold as much as 150% of its weight in water or nutrient solution!

Use Dyna-Rok II as a stand-alone growing medium, or as a soil amendment. Especially effective in hot dry climates!

Dyna-Rok II can be used indoors or out, and works well with:

Vegetables
Fruit Trees
Shrubs
Perennials
Annuals
Orchids

This lightweight, porous growing media is ideal for hydroponics systems.

Packaged in a 40 liter bag (1.4 cubic feet), Dyna-Rok II Medium Grade measures 7 - 15 mm.