Every winter, gardeners sort through paper envelopes stamped with dates from several seasons past. While parsnip and onion seeds lose viability within a year, tomato, brassica, and cucumber seeds can readily sprout even after five years in cool storage.
The Seed Viability Water Test: Are Your Old Seed Packets Still Good?
Found a stash of seeds from three years ago? Do not waste weeks waiting in garden beds. Use this damp paper towel test to check germination rates in 5 days.
Johny Alex•Founder & Head Grower
Field-tested vegetable growing specialist
Growing Quick Facts at a Glance
Sunlight
Room temperature indirect light
Watering
Damp paper towel in zip-top bag
Soil pH
N/A
Days to Harvest
5–10 days test window
Spacing
10 seeds in a row
Difficulty
Easy
The 10-Seed Paper Towel Method
Dampen a sheet of paper towel, arrange exactly 10 seeds along one half, fold it over, and slide it into a labeled zip-top bag. Keep it in a warm cabinet (70°F / 21°C). Check on day 7: if 8 seeds sprout, you have an 80% germination rate and can sow normally!
Johny Alex
8+ Years in Small-Space & Raised Bed Food GrowingFounder & Head Gardener
I believe anyone with a square foot of sunlight can grow real, delicious food. Over 8 years ago, I started with two cracked terracotta pots on a drafty balcony and killed my first batch of tomatoes. Today, I grow over 40 varieties of heirloom vegetables, greens, and root crops using simple, organic methods that respect the soil and your time.
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