Hearing about your garden is always inspiring, Alex, though it always make me wonder if I somehow didn't plant early enough, didn't take care of my plants enough.
So it's good to hear from HG, farther north, that this is the way it's SUPPOSED to be.
Alex, I wanted to point out, though, that it's confusing when you say "Sweet Peas" -- I realize you mean GARDEN/GREEN peas. Whether eat while flat-pod, sugar snap pod, or shelled green type, they are indeed very sweet. I gave three of our first harvest shell peas (Lincoln) in pods to the kids and a fried to eat for a snack, and the boy said they were the "bestest" peas he's ever eaten.
I think of "Sweet Pea" as the plants grown for the large/showy and sometimes sweetly fragranced flowers (I prefer the fragrant ones). Although their flowers mature into pods, those "peas" are considered toxic and not to be eaten.