What it is
Groundnut (Apios) (Apios americana) is in the Fabaceae (Legume) family. A native nitrogen-fixing vine with strings of protein-rich tubers — a traditional Indigenous survival food.
How to grow it
It wants part shade, water it moderate to high, and give it rich, moist soil. Target a soil pH around 5.5–7.0. Space plants about 12 in apart. Expect roughly 2 yr to tuber. Hardy native vine.
How it's used
Groundnut (Apios) is used: tubers cooked; seeds.
🔎 How to identify it
- Compound leaves, 5–7 leaflets
- Twining vine
- Fragrant brown-maroon flowers
Edibility
How to grow & propagate groundnut (apios)
Everything I've worked out about starting this one, keeping it alive through a Texas year, and turning one plant into many — free.
How to propagate groundnut (apios)
Legumes resent transplanting — that taproot wants to go straight down — so sow them right where they'll grow once the soil has warmed. Soak hard-coated seed overnight to speed germination. As a bonus, this whole family pulls nitrogen out of the air and banks it in the soil, so wherever you grow them you're feeding next season's crop.
Growing groundnut (apios) in Texas
Give it part shade and rich, moist soil. Match the spot to the plant and most of the battle is already won.
Because it's a perennial, the work is mostly up front. Get it sited and established and it comes back on its own year after year — one of the best returns on effort in the whole garden.
Keep moisture even, especially while it's young — deep, less-frequent soaks build better roots than a daily sprinkle.
Harvesting
Figure on roughly 2 yr to tuber before you're harvesting. Harvest at peak and keep harvesting — most vegetables produce harder the more you pick, and one left to over-mature tells the plant its job is done. The part you're after: tubers (cooked).
Making more for free
Every seed we sell is open-pollinated, which means you can save your own from the best plants and it'll grow true next year. Let a few of your strongest plants finish and go to seed, dry it fully, and store it cool and dark. That's the whole point of heirlooms — buy once, grow forever.
Keep this knowledge offline
A garden full of groundnut (apios) is a real asset when times get hard — but the know-how to grow, store, and use it shouldn't live only on a website you can't reach. That's why I keep a copy of the references I rely on on a local server at home. Project NOMAD is a free, open-source way to run Wikipedia, survival and medical guides, maps, and even a private AI on your own hardware — knowledge that keeps working with no internet, no cloud, no signal.
See how I keep my library offline →Part of the free Texas Roots plant database, compiled by Jordan Polasek from his greenhouse in El Campo, Texas. Free to read and share. If it helped, the best thanks is to grow something.