I usually plant the cold-sensitive stuff like tomatoes in early May. I've never had a problem with frost damaging plants in early May, but no question it's best to wait until May. I'd never plant that stuff in April. I look forward to planting cold-tolerant stuff like broccoli and lettuce in late March. Looking forward to gardening season, but hoping we have some snow to enjoy before then. Hopefully tomorrow night will work out, and maybe we can pull off another event or two in early to mid March.