We pulled the last of the snow and shell peas today, and replanted new snow and shell peas for a fall crop - same varieties: Oregon Sugar Pod snow peas, and Pioneer shell peas.
The spring crop was ready for first harvest after about 70 days. So everything else equal, we could expect a new crop around the beginning of October. However, the spring crop starts with short, cool days and ends with long, hot days. The fall crop sees just the opposite. We need to keep them well-watered in the hot months so they don't just croak.