Last year, I WSed dill seeds. They came up, I never planted them, they died. I left the jug out on my back patio and after it cooled off in the fall and rained, I had sprouts! This was all much to my surprise. So, they've survived the winter and today I finally planted them! LOL LOL LOL
(The fork you see on the right side of the picture is the row marker for my peas.)
I planted catnip in a planter on my back porch 3 years ago. I thought it died after the first winter, but it comes back stronger and better each spring. I don't cart it inside either. If it's going to be really cold for a few days, I might drag the container up against the west side of the sunroom and maybe cover it, but it's a survivor. My neighbors' 2 cats both like to come and lay in the planter. LOL
i think cat nip [Nepeta] is hardy to at least 5, if not 4. I know I planted some at my Wisc place thinking it would come back... i would not have done that if it were not hardy. I'm zone4 up there.
Maybe i'll put that little pot on the south side... it spent the winter inside of a larger pot.
I recall in the late fall, when all the foliage had died back... Charlie ran up and grabbed a branch of it. I was planning on planting it by the Shastas, as he likes to lay in the foliage in the summer.