I have a plant or few outside in the cold, I did not plant them, they came up on their own. Seeds the chickens didn't find, and I just left them there, this one has been frosted on several times, I am not covering, washing the frost off, it lives or it dies, a test of my Wet Teddy Beers auto, how cold can they go? So far they have survived 18* F with a much heavier frost. This one is in the pot the others are not and have no soil to grow in (dust on a sand rock). I'll post another pic once the frost is off, maybe I can get a clear pic LOL.