I grow one every year in Alabama and it lasts until the first hard frost. I feed my plant once every 10 days with liquid blue feed. They bloom so heavily it takes a lot out of the plant. Good luck.

I just harvested some and would love to trade for your columbine.

Paula, Thank you for the offer but I don't collect gobs and gobs of seeds. I just collect a few seed heads of things I think others might like to grow and a few for myself for the next year if they are annuals. I shouldn't say this here on the garden web but I toss most seeds in the trash as I am cleaning up my gardens ( take a deep breathe, stop gasping...lol). I think this year I will collect more than usual because I feel like a cheap skate when I see some of the other seed packets in swaps...lol I have added the petunias to your gift package and again, thank you for the offer. I will pass this time though. Lisa

Black Eyed Susan Vine (Thunbergia alata)is actually a tender perennial, usually grown as an annual. If it's in a pot, bring it in for the winter and keep it above 45 degrees. If it's in the ground, either save seeds for next year or dig it up.