I get it at my local nursey . its food grade & its used as a bug killer & its 85% pure silica . http://www.amazon.com/St-Gabriel-La...363534773&sr=8-1&keywords=st+gabriel+organics
I just add a couple tablespoon fulls when i do my transplanting . has been working great
It gives you the silica the plants love & kills any soil bound larva & bugs +++
I just add a couple tablespoon fulls when i do my transplanting . has been working great
It gives you the silica the plants love & kills any soil bound larva & bugs +++