When should I harvest peas?

Answer 1

sugar snap peas may be picked at any stage really, try to pick them before they get too big and tough say 3-4 inches

other peas may be picked when the pods are full.
don't let these on the vines too long unless, you are saving the seeds

Answer 2

Pick your peas as soon as the pods are full. That's one of the veggies where you want to keep planting every few weeks to keep the supply going.

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Answer 3

When the pods have filled