I live in Wellington, Florida and there was a cow farm very close to me torn down like 8 months ago but there is still a part with ginormous amount of green land. I heard they grew like in cow farms. But if not there, where do they usually grow?
In moist areas with shade. Animal turds often provide perfect conditions but are not a requirement (why do you think Hidu's think cows are holly?). Before shroom hunting you should really learn how to ID them front to back. There are so many species and most of them will either kill you or make you very sick and some of these can look like the trippy kind. If you find any you can post pics on here, we have a few members who can help you.
Get a copy of Paul Stamets book Psilocybe mushrooms of the world..... The best identifying guide out there. ( you can a PDF for free from 4shared.com) But Psilocybe Cubensis is easy to identify....... Grows in well manures areas, golden cap, partial veil, blackish purple spore prints and it stains blue when bruised..... Nothing harmful meets those criteria