it shouldn't be much different than outdoor soil... however it may be lacking in some sort of nutrient.. check the ph of the soil before use, i'm not really sure if ants is beneficial or harmful to the grow process.. i would assume that they are neutral unless you have a huge colony of them
Deepsuthern Reviewed by Deepsuthern on . Can I use old soil that has small ants coming in and out? Old soil is about five years old. I see some small ants ALIVE. Rating: 5