I am in Gulf Coast 8b/9a. I grow passion vine on a pomegranate bush. The vine does not get going well until after the pom has flowered. It is very vigorous after that but in late summer after it drops its fruit the Gulf Frittilary butterfly pretty much decimated it, which is fine with me. I complete the job easily and compost the vines or just chop and drop. I have lemongrass,perrenial onions, spearmintg, savory, and raspberries at the base and a hibiscus planted on the east side. I plant peanuts around all of it and mulch with their hay plus add lablab to the hibiscus in the spring.