Unfortunately, I've never had much luck with sweetpeas. I think it just gets too hot, too fast here! If you do want to try them, though, plant very early -- like maybe January or February. I hope others can give you more specific info. Good luck!

I've been told the wild ones are perennials. I have noticed they have deep roots so they don't transplant well. In spite of that, I managed to do it anyway and have one living in a 12" deep concrete-bottomed bed in front of my house in full sun. It doesn't even get much water on a regular basis and it's fine. So IMO they are tough things that will grow if given only half a chance. I'd sow them now - they know if they should or should not germinate now. Just let them do their thing.

Yes, the wild ones definitely are perennial -- and they're very tough! Unfortunately, they don't have a scent!! :-/