Groundnut plant profile
Apios americana
A perennial vegetable for full sun.
Last updated .
When to plant
When to plant Groundnut
NC State Extension says to plant groundnut tubers two to three inches deep in early spring, mulch to suppress weeds, and give the young shoots something to climb. After one year, several one-inch-thick tubers can be harvested per plant.
The calendar shows this cited seasonal window as an approximate band. It does not convert the season into frost-adjusted dates.
Open Groundnut in my garden calendarShows the source-backed planting season, not frost-adjusted dates.
Growing conditions
- Sun
- Full sun
- Planting depth
- 3 in
- Lifecycle
- Perennial
- Hardiness
- Zones 4a to 9bFind my hardiness zone
Common problems
Watch for these
Also watch for: spreads to form colonies, can become weedy.
Next steps
Continue with Groundnut
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Apios americana (American Groundnut, Potato Bean, Hopniss)
NC State Extension Gardener Plant Toolbox. Supports general reference. Checked 2026-06-18.