Quote Originally Posted by stinkyattic
Greensand is a rich source of micronutirents, rather than an inert soil structure amendment like washed quartz sand is, although quartz may supply Si at low levels. I'm not sure what the solubility of Si04 is at pH 6.8.
What's Greensand? I'm still looking for a simple source for Silica. A gyspy told me, I need a small amount of a Silica supplement.....

...for my plants, I assume...:smokin: