I wrote about free blackberries naturally growing in my backyard before. I let them expand more this year and they will continue. It’s great. No very little work involved.
The plan is to cut some paths through to allow for easy picking. First, I have to let them expand to make that possible.
I didn’t have to plant these blackberries, but if you would like them in your yard too, blackberry seeds are available. The only test I know of to know if your soil is good for them is that if there is already a presence of some wild berries(wild strawberries, raspberries, etc), your soil is likely good for blackberries.