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I got some diatomaceous earth (Gaia Green Brand) to take care of some fungus gnats and it did the trick.

I soon learned that DE is also a decent source of silica, and I figure since I already have this stuff lying around and it has other benefits, I might as well use it. My problem is when trying to research its use in this way, I come up with almost nothing. Tons of info on using DE to control pests but not much for using it as a source of silica.

I’m currently on week 4 of flower and I was thinking of watering some DE into my soil at a ratio of 1/3 cup per 4 liters (1 gallon) of water. My questions are: will this be effective? How long will it take for the silica to become plant available?

Other details:

I’m growing in Pro Mix HP, amended with Bokashi Gro and using Medi One 4-3-3 as my nutrients.