>>3757495It's ecology is Saprotrophic, which means it feeds off of dead organic matter and don't depend on any trees for symbiosis, so you can expect them anywhere when it is season. I've found them under trees, without trees, in places with lots of grass but also in places with no grass at all but covered by dead pine foliage... You get the point.
https://en.wikipedia.org/wiki/Macrolepiota_proceraThey are pretty much everywhere, but only in the mushroom season in Autumn which would be from August to November here, for you it'll depend on your latitude and local climate. But they're pretty much everywhere. Once you learn to identify them you'll find them everywhere all the time. They're among the easiest for beginners and they're pretty tasty.