I usually do that but the past few years my son has green manure on the entire garden so I have to wait. This year I asked him to leave a few rows open so I could get a head start. It's been too wet so far to plant anything directly in the garden.
I have one row under cover of brassica, lettuce, radishes , turnips and favas that were planted late fall. I lost a few things but a lot is still going strong. If I pull out the bad stuff I could probably plant some beets and carrots and turnips though.