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Apparently you can, as I read on this and many other web sites. The trick is to leave the pods on the plant until they're very dry, and then store them in an envelope until next season. You want all of the moisture to be gone, so that no mildew forms during storage.
I've taken the peas in this picture and put them away for next season... hey, you never know! And to think that in previous years I may have composted perfectly good seeds ;)
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