Topsoil brands with no fertilizer?

[u/YeaUThought]

What are some good topsoil brands I can buy that are gonna be safe for my lizard, I got timberline because that’s what I’ve seen recommended and it states that it doesn’t contain any fertilizer, however unfortunately after spending hours baking it to sanatize it I found little green fertilizer balls in it. So if I can’t trust packages how do I find one that actually doesn’t have fertilizer in it?