gardenbetty.com
In general, you can expect most vegetable seeds to last two to three years after their packing date, though there are exceptions—like onions, which start to deteriorate after just one year.
A seedling with compromised vigor may have a missing cotyledon, look stunted or scrawny, or seem overall slower to develop than seedlings from fresher seeds.
Vegetables / Shelf Life Artichokes - 3 years Arugula - 6 years Asian greens - 3 years Asparagus- 3 years Beans - 3 years Beets - 3 years Broccoli - 3 years Brussels sprouts - 4 years Cabbage - 4 years
Cardoon - 3 years Carrots - 3 years Cauliflower - 4 years Celery/celeriac - 4 years Chard - 3 years Chicory - 4 years Chinese cabbage - 3 years Collards - 4 years Corn (sweet) - 2 years Cress - 5 years
Cucumbers - 5 years Dandelions - 2 years Eggplant - 4 years Endive - 5 years Fennel (bulb) - 4 years Kale - 4 years Kohlrabi - 4 years Leeks - 2 years Lettuce - 3 years Melons - 5 years
gardenbetty.com