Can you plant seeds leftover from last year?

When properly stored, most seeds stay viable for at least one to two years. Over time, however, their germination rate—the number of seeds likely to sprout over a given period—lessens.

How long seeds last depends on their type. Corn and pepper seeds aren’t likely to last for more than a year while bean, pea, tomato and carrot seeds can stay viable for up to four years.

To test the germination rate of leftover seeds, place 10 of them evenly apart on a damp paper towel. Roll up the paper towel with the seeds, place it in a plastic bag and store the bag in a warm place. After a few days, check the paper towel. The number of germinated seeds will give you an idea of how well they’ll fare in your garden. If only two or three seeds sprouted, it’s best to buy new seeds.

To help seeds last past their expiration dates, be sure to store them in airtight containers in a cool, dry place. For more seed tips, visit your local garden center.