I've seen many different dilution rates, from 1-4 tablespoons DE per gallon of water to 4-6 tbsp for a spray bottle to as much as 8 tablespoons into every 2 cups of water. I think I used 4Tbs/16 ounce spray bottle when I did my DE test. Try to spray up on the bottoms of the leaves so you don't mess too much with photosynthesis on the tops.I’m going to try the diatomaceous earth for my veg tent