Last weekend the National Weather Service put all of West Virginia under a freeze warning, with lows as cold as 29 degrees and a warning that frost could kill crops and other sensitive plants. For a lot of West Virginia families, that means the tomato vines are finished for the year.
But tomato season doesn't have to end on the vine. Some of the most famous tomatoes in America started with a West Virginian who simply saved seeds. In the 1930s, Marshall Cletis Byles of Logan, better known as "Radiator Charlie," planted three tomato varieties in a ring around a German Johnson, then saved seed from his best fruit year after year until the new variety was stable. He sold the seedlings for $1 apiece and used the money to pay off his house. That's how the Mortgage Lifter tomato got its name, according to WVU Extension.
This week, your kids can do what Radiator Charlie did: rescue the seeds from the last tomatoes of the year, find out how many are alive, and start a fresh crop indoors while the hills turn brown and gray.
What your kids will learn
Seed saving packs a full unit of life science into one tomato. Here's what each age group gets out of it.
Grades K–5
- The plant life cycle: seed, sprout, plant, flower, fruit, and back to seed
- What a seed needs to germinate: water, warmth and air
- Naming the first root, the shoot and the seed leaves (cotyledons)
- Counting sprouts and recording them with drawings and simple charts
Grades 6–12
- Heredity: why seeds from heirloom (open-pollinated) tomatoes grow true to type and seeds from hybrids may not
- Writing a hypothesis and calculating a germination rate as a percentage
- Variables: what you change, what you measure, and what you keep the same
- Collecting, graphing and interpreting daily growth data
This week's activity: the Radiator Charlie seed rescue
All you need is one ripe tomato (from your garden, a farmers market or the grocery store), a small jar, a strainer, a paper plate, paper towels and a zip-top bag.
- Cut and scoop. An adult cuts the tomato in half. Kids use a spoon to scoop the seeds and their jelly-like coating into the jar, then add a splash of water. Put a piece of masking tape on the jar and write the date and the tomato's name if you know it.
- Let it ferment. Set the jar in a warm spot for 2 to 4 days and stir once a day. A film will form on top. That's normal: the fermentation breaks down the gel coat that keeps seeds from sprouting inside the fruit. Have kids describe what they see (and smell!) each day.
- Sink or float. Add more water and stir. Healthy seeds usually sink. Pour off the film and any floaters, then rinse the sinkers in a strainer.
- Dry them. Spread the seeds on a paper plate (they stick to paper towels) and let them dry for about a week, stirring now and then.
- Run a germination test. Count out 10 seeds onto a damp paper towel, fold it over, slide it into a zip-top bag and keep it somewhere warm. Check every day and record the day each seed sprouts.
- Do the math. Sprouted seeds ÷ 10 × 100 = your germination rate. Older kids can graph sprouts per day and compare their result to their hypothesis.
Bonus challenge: if your tomato was a hybrid, ask your kids to predict what its "children" will look like next summer. That question is exactly what Radiator Charlie spent years answering.
Make it easier with a ready-to-go kit
Want to skip the hunt for supplies and get straight to the science? The Heirloom Tomato Seed Germination Science Kit ($25) comes with 20 heirloom tomato seeds in assorted varieties and absorbent germination paper, plus a grade-level curriculum and worksheets emailed to you after purchase. Pick Grades K–5 (4 lessons) or Grades 6–12 (5 lessons, including heirloom varieties and heredity). The worksheets include a daily observation log, a variety comparison chart for days to sprout and root length, and an end-of-project reflection or lab report template. Tomato seeds typically sprout in 3 to 10 days, and when roots reach about half an inch, kids transplant them into soil to keep the study going.
Short winter days are hard on seedlings, so if you want to grow those sprouts into real plants before spring, the LED Grow Light Plant Stand Science Kit ($200) turns a corner of your house into an indoor grow lab. It has two shelves, each lit by a 2 ft, 10-watt full-spectrum LED bar, and each shelf holds a standard 10×20 tray (trays sold separately; assembly required). Its curriculum covers photosynthesis, how seedlings bend toward light, and what happens when plants get too little light.
Join the growing community
Every kit comes with an invitation to Aardvark's Seed Planting For Little Hands, our private group for families using our kits. After your order, request to join and we'll add you. Kids can post photos of their seed jars and first sprouts, compare germination rates, and ask questions when an experiment does something surprising. You'll be growing alongside young scientists from the West Virginia hills to the Arkansas Ozarks and the Arizona desert.
Keep your tomato season going
A freeze warning ends the garden year, but it's a great time to start a seed lab. Save a few seeds this weekend, test them next week, and your kids will be the ones telling the Mortgage Lifter story at the dinner table.
