Around here, everyone waits on the "magical date" of the May 10th cold spell to pass but take that w/ a grain of salt. Your garden will make it if you plant everything the first of June. Cool weather crops like cabbage, lettuce, onions, broccoli, etc can be put out now. We've moved all our cabbage and cauliflower plants out of the greenhouses to harden them up but people have already been buying them to set out.

Where are you located? We're technically in zone 6 but its so damn cold here we consider ourselves in zone 5 :-)

Regards,

Tom