harvesting sweet pea seeds
I have picked some sweet pea pods from a friend's plant. Some are ripe and some are still green. Can I ripen the green ones in the hot water cupboard or similar? Thanks.
Plant seeds, whether for flowers or some other kind of plant, need to ripen on the plant before you pick them. As far as I know, there's no way to ripen seeds off the plant. This article has more information on saving seeds: https://www.gardeningknowhow.com/ornamental/flowers/fgen/harvesting-garden-seeds.htm