Section 1
Easy starters: tomato, lettuce, peas, beans
These are self-pollinating, so you don't need isolation distance. Pick fully ripe fruit, ferment tomato seeds (3 days in water, then rinse and dry), let lettuce go to seed and shake into a bag, dry pea/bean pods on the plant until they rattle.
Section 2
Harder: brassicas, cucurbits, alliums
These cross with anything in their family within insect range (often 1/4 mile). Need isolation by distance OR by timing OR by physical bagging. Cabbage in flower will cross with mustard, turnip, and bok choi.
Section 3
Drying and storing
Spread seed in a single layer on a paper plate. 2 weeks in a dry room. Then into a labeled paper envelope inside a glass jar in the fridge — extends viability from 2 years to 10+. Add a silica packet from a vitamin bottle to absorb moisture.
Section 4
Germination test before planting
Lay 10 seeds on a damp paper towel inside a plastic bag. After the variety's germination window, count how many sprouted. 8/10 = 80% — adjust your sow rate. <50% = compost the lot.
