Tonight, the whole state of West Virginia is under a freeze warning. The National Weather Service expects lows as cold as 29 degrees from 1 a.m. to 9 a.m. Sunday, and it warns that frost and freeze conditions could kill crops and other sensitive plants (WV MetroNews, Oct. 17, 2026). Frost is possible again Sunday night.
For a lot of Mountain State gardens, that means the tomato season ends this weekend. But those last tomatoes on the vine still hold something valuable: seeds. Saving seeds is an old Appalachian habit, and it also makes a great science lab. This weekend your kids can pick the last tomatoes, save the seeds, and then run a real experiment to find out how many of those seeds are still alive.
Here is how to turn the freeze into a week of hands-on homeschool science.
What your kids will learn
Grades K–5
- What a seed needs to sprout: water, warmth and air
- The parts of a sprout: the first root, the shoot and the seed leaves (cotyledons)
- The plant life cycle: seed, sprout, plant, flower, fruit, and back to seed
- How to count, draw and record what they see each day
Grades 6–12
- Germination rate: how to measure the share of seeds that sprout, and why farmers care
- Heirloom (open-pollinated) varieties and why their seeds grow plants like the parent
- Designing a fair test: one variable changed, everything else kept the same
- Collecting data, graphing it and writing a short lab conclusion
This week's activity: the frost-night seed rescue and germination test
You can do this with tomatoes from your own garden, a neighbor's garden or the farmers market. An adult should handle the knife.
- Rescue the fruit. Before tonight's freeze, pick the ripest tomatoes left on the vine. If you can, choose an heirloom variety. Seeds from hybrid tomatoes may not grow plants like the parent, and that is a great question for older students to investigate.
- Scoop the seeds. An adult cuts the tomato in half. Kids squeeze or scoop the seeds and gel into a small jar with a few spoonfuls of water.
- Let it sit. Cover the jar loosely and leave it on the counter for 2 to 3 days, stirring once a day. The gel coating breaks down, and good seeds usually sink to the bottom.
- Rinse and dry. Pour off the floating bits, rinse the seeds in a fine strainer, and spread them on a paper plate or coffee filter to dry for about a week. Label each batch with the variety and the date.
- Run the germination test. Count out 10 seeds. Lay them on a damp (not dripping) paper towel, fold it over, and slip it into a zip-top bag. Keep it somewhere warm, like the top of the fridge.
- Check every day. Kids record the day each seed sprouts and draw what they see. Tomato seeds usually sprout in about 3 to 10 days.
- Do the math. After 10 days, divide the number of seeds that sprouted by 10 and multiply by 100. That is your germination rate. Older students can test two batches side by side, such as warm spot versus cool windowsill, and graph the results.
If you don't have tomatoes left to rescue, or you want to compare your saved seeds with known heirloom seeds, our Heirloom Tomato Seed Germination Science Kit ($25) has everything in one box: 20 heirloom tomato seeds in assorted varieties, absorbent germination paper, and grade-level curriculum and student worksheets for K–5 or 6–12. The worksheets include a daily observation log and a variety comparison chart, so your kids record days to sprout and root length like real seed scientists. Once roots reach about half an inch, the seedlings can move into soil on a sunny windowsill.
Want to keep going all winter? The Heirloom Vegetable Seed Science Collection ($85.95) is our most popular kit. It includes 30 heirloom varieties and about 5,000 non-GMO, open-pollinated seeds, from Detroit Red beets and Long Standing spinach to Roma tomatoes and Sugar Pie pumpkins. The curriculum covers seed anatomy, plant families, heredity, designing germination trials and seed saving. That's enough material for a whole season of experiments, and plenty of seeds for a spring garden.
Join the growing community
Every kit purchase includes an invitation to Aardvark's Seed Planting For Little Hands, our private group for families who use our kits. Kids and parents post sprout photos, compare germination rates, ask questions when something doesn't sprout, and cheer each other on. Young growers from West Virginia's hollows and hilltops are learning alongside families in Arkansas, Arizona and beyond. We'd love to see your frost-rescue seeds sprout!
Turn tonight's freeze into a science lesson
The garden may be done for the year, but the science doesn't have to stop. Save some seeds this weekend, run your germination test, and let your kids find out for themselves which seeds are still alive.
- Heirloom Tomato Seed Germination Science Kit – $25 (choose Grades K–5 or 6–12)
- Heirloom Vegetable Seed Science Collection – 30 Varieties – $85.95 (choose Grades K–5 or 6–12)
