Seed starts

Started artichoke and cardoon seeds today. I may have time to vernalize the artichokes, but if not, then someone will get to eat them next year. I'm trying to decide what else I should start, since I only have the one seedling heat mat -- maybe celery and strawberries? Or more pepper cultivars. I want to start peanuts and butterfly weed (asclepias) as well, but I think those will do fine without extra warmth.