Answer: Seeds lose viability as they age. How well they might germinate really depends upon how they've been stored. I'd take a chance that at least 50 percent of them will sprout. This spring, when it's time to plant the seeds, you can do a viability test. Place 10 seeds in a dampened papertowel and fold it over them, then place the papertowel in a plastic bag and set it on the kitchen counter. Check the seeds in 7 days. Count how many have sprouted and that will give you an idea of the percentage of seeds that will likely grow if you plant them. Based upon this information, you'll know how many seeds to plant to get one plant.
Best wishes with your garden!
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