>>2719371Just be sure it's native, then you're golden.
other than that
PLANT CARROTS AND POTATOES ON PUBLIC PROPERTY
PLANT BERRY BUSHES NEAR THORN BUSH PATCHES
GROW CORN IN THE WIDE FLAT SPOTS UNDERNEATH HIGH VOLTAGE POWER LINES
YOU WILL HAVE DOZENS OF ACRES OF FARMLAND WITHOUT PAYING A DIME
In all seriousness, if you can put something edible in a place no one will care about, and not fuck up the local plant life, do it. It's good for you, and anyone who wanders by.