I planted peas yesterday. The soil was nicely thawed and has been thawed for over a week now. I turned it a couple weeks ago, but it froze up soon after that. It thawed again soon after. It's drained well now and certainly workable.
I plant peas by digging a trench about an inch deep and 6 inches wide. I scattered in the peas. (I didn't have inoculant and will add some to the soil as soon as I find some. It's new soil and I want to be sure the nitrogen fixing bacterial are there.) I scatter the pea seeds fairly dense. They can hold each other up this way. I left space between the rows for another planting in a couple weeks.
Grow peas, grow!