I’m in zone 8b so I’ve planted Mulberries (fruit the first year) loquat, paw paw, jelly palm, mandarins on trifoliate rootstock, yuzu, Harvey lemons, blueberries, lemon grass, licorice grass, red bay, many varieties of figs. I have about 15 potted tropical plants that I build a small discrete frame over the majority of the plants in winter and each night it drops 37 and lower I wrap them in frost blankets. I have c9 incandescent Xmas lights on my plants as well. This whole setup can stay at a temp of 52 degrees on a 20 degree night and can hold that temp over many days if needed.