Looks like edible pod peas. Snow peas, maybe ? They all like cool weather, temps, down to 18 degrees, or ????
Doesnt bother them.
Start them earlier.
Hear, where it dosent get below 18 degrees, we plant, snow peas seeds Sept 1 st.
Mine quit producing around May.
Heat, kills them, from bottom, up.
Pepper's !!! Could be to much or to little water.
Could be, they need fertilizer.
It, also, be as simple as Empson Salt.
Pepper's ! Along with, tomatoes, and eggplant, really like ! Empson salt !
Use both, as directed.