Big news for plant science in Arkansas: on October 26, the University of Arkansas System Division of Agriculture announced a $2.5 million USDA grant to replace its aging research greenhouses in Fayetteville. With the Division's matching funds, it's a $5 million project: nine new climate-controlled greenhouses with automated heating, cooling, lighting and humidity controls, plus a classroom.
The old greenhouses date to the 1960s, and researchers say they can no longer control conditions well enough for year-round work. The new ones will help fruit and vegetable breeders and plant scientists run longer, more reliable experiments, with construction expected to wrap up in late 2028.
Here's the fun part for homeschool families: the big idea behind a $5 million greenhouse, controlling the conditions so you can test one thing at a time, is the exact same idea your kids can test on a windowsill this week with a few seeds and a plastic bag.
What your kids will learn
Grades K–5
- The parts of a seed: seed coat, embryo and stored food
- What a seed needs to germinate: water, warmth and air
- How a greenhouse traps warmth and moisture
- Observing, drawing and measuring roots with a ruler
Grades 6–12
- Germination physiology: water uptake (imbibition), enzyme activation and the first root (radicle) breaking out
- Writing a hypothesis and setting up a controlled experiment
- Collecting quantitative data and calculating germination rate
- Connecting humidity and evaporation to why researchers build controlled growing spaces
This week's activity: The Mini-Greenhouse Test
Question: Do seeds sprout faster inside a "greenhouse" than out in the open air?
- Gather supplies. You need 10 seeds that sprout quickly (sunflower seeds are great), two paper towels, one zip-top bag, a small plate, a ruler and a notebook.
- Write a prediction. Younger kids can draw what they think will happen. Older kids should write a hypothesis, such as "Seeds in the sealed bag will sprout sooner because the towel stays damp."
- Set up both groups the same way. Wet both paper towels so they're damp but not dripping. Place 5 seeds on each towel and fold it over.
- Build the greenhouse. Slide one towel into the zip-top bag and seal it. That's your mini-greenhouse. Lay the other towel on the open plate. That's your open-air group.
- Same spot, same start. Put both side by side somewhere warm, out of direct sun. Don't add water to either one after day one. Moisture is the thing you're testing.
- Observe daily. Each day, record how damp each towel feels and how many seeds show a root. Measure the longest root in millimeters.
- Wrap it up. After 5 to 7 days, compare the groups. Which kept its moisture? Which sprouted more seeds? Calculate the germination rate for each (sprouted seeds ÷ 5 × 100).
Kids usually discover that the open-air towel dries out much faster in a heated house, which is exactly why greenhouse researchers care so much about humidity control.
Make it easier with a ready-to-go kit
The Sunflower Seed Germination Science Kit is basically a mini-greenhouse in a box. It includes 10 sunflower seeds, absorbent germination paper and a resealable germination pouch, so you can start the moment it arrives. Sunflower seeds typically sprout in 2 to 5 days, which is perfect for kids who want results right away.
- Grade-level curriculum: four lessons for K–5 or 6–12 (you choose at checkout), emailed after purchase
- Worksheets: a daily observation log with space for drawings, a root-length measurement chart, and a reflection page (K–5) or lab report template (6–12)
Want to add a mystery? The Surprise Herb or Vegetable Seed Germination Science Kit sends one packet chosen from 50 popular herbs and vegetables, plus K–5 curriculum and worksheets. Kids get to identify the variety by its seed shape, size and color, then race it against their sunflowers.
Join the growing community
Every kit includes 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. Post your greenhouse-vs-open-air results, share root photos, and see how other kids' experiments turned out.
Young scientists from the Ozarks to the Delta are growing right alongside families in West Virginia and Arizona. Who knows? A few of them might be running experiments in those new Fayetteville greenhouses someday.
Start your greenhouse experiment
- Sunflower Seed Germination Science Kit – Plant Biology Curriculum & Worksheets: $25.00
- Surprise Herb or Vegetable Seed Germination Science Kit – Plant Biology Curriculum & Worksheets: $15.00
Happy growing, Arkansas!
