Onion seeds, and leeks should probably be replaced. Peppers, tomatoes,
beans, peas, eggplants, squash, melons, cucumbers, cabbage, broccoli,
turnips, mustard, lettuce are definately still good after 1 year. I
have no idea about corn, celery, dill, and carrots.
I don't know about celery, but we've used corn, carrot and dill seed
that we've had for several years. As long as the seed is stored in a
cool, dry place it will probably stay viable.
A neighbor of ours, who was truly an amazing gardener (retired farmer;
he has since passed away) had a particular kind of hybrid melon that
he really liked. He bought the seed in bulk, used a few seeds every
year — and used the seed for 20 years until it was gone.
"Testing seeds in water" works, too. The ones that sink are viable;
the ones that float are not. I use this method when harvesting seeds
from the garden. I discard the ones that float, let the others dry out
and then store them until the next spring.
LeAnn
http://ruralroute2.com