don't over water and you won't get gnats.
sand doesn't work.
pyrethum bombs kill everything.
let the soil dry out and the gnats die.
happy growing.
they breed in the soil because it is so wet.Actually the gnats wasnt from overwatering. They were getting in threw cheap windows and then trying to breed in the soil. A light layer (1/4 inch or so, for god sake google it) makes it impossible for them, plain and simple. We dont use chemicals or bug bombs (lol) of any sort on our medical herb. Thanks for trying to help but we got it handled.
I love how dude can tell how much sand I have from a pic. Im telling you, its all sand. Stuff will grow in pure sand. WOW.