Good morning,
There is very little we grow "not as perennial."
Sweets are my ground cover and yams a climber in both st Petersburg Florida and the oregon coast.
It is a challenge to grow enough calories to be self sufficient. Especially without grains. Sweet potatoes are my easiest solution. As a ground cover they provide virtually unlimited pot greens. I trim walkways to harvest greens.I pull tubers as needed.
I plant them in compost rich soil.
Top dress with compost regularly. Turn the chichens loose in the fall when the greens start to fade or if bugs get too vigorous. Find good ethnic markets for seed stock. Purple, red fleshed, orange fleshed, white. Some sweeter some more savory. There are hundreds of kinds grown around the world.