When you want fresh peas for as long a period as possible, the biggest challenge is probably to be able to extend the season into the fall.
Most often, the plants are affected by mildew during September, so you hardly get an edible pea out of your efforts - this is at least how my attempts to get an acceptable October harvest have gone in the past.
The good news is that the pea variety Terrain is reasonably resistant to powdery mildew, so that for the last few years I have been able to sow in July and harvest in October-November. The bad news is that this year the plants have been attacked by so much else
The stems wither and blacken from below, where the plants probably suffer from blackleg, wilt, root rot or what the heck I know - why both pods and peas are less developed than usual, and the taste at the same time less sweet and fresh than desired. The pea connoisseur in this house claims that they almost taste earthy, and bother to eat them badly - and then it's really wrong!
One can probably not blame anything but the weather, as constant high humidity and a fairly wet soil provide ideal conditions for the development of the fungi.
In 2018, things can only get better