Usually don’t cross with other varieties (exception: potato leaftypes such as Brandywine.)
Seeds need to be fermented for 2-3 days to remove gel coating
Sweet peppers will cross with hot peppers growing nearby
Scrape seeds out of ripe pepper and lay out to dry.
Cucumbers can cross with other varieties growing within 1/2 mile
Let fruit get overripe and hard on the plant, like a gourd, for seeds.
Summer squash and zucchini can cross with some winter squash
and with pumpkins growing up to 1/2 mile awayLet fruits get large and hard on the plant, like a winter squasha.
Winter squash can cross with pumpkins and summer squashgrowing up to 1/2 mile away.
Save seeds from at least 100 corn plants to avoid inbreeding
Corn can cross with other varieties growing up to 2 miles away
Save seeds from open-pollinated (OP) varieties, not hybrids (F1)
Let some plants bolt to make seeds
Harvest seed by bending lettuce flowers over a paper bag andrubbing the flowers with your hand.
Green beans usually don’t cross with other varieties
For seeds, leave some pods on the vine until they start to dry out.