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Apios americana (Groundnut)

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description Apios americana (Groundnut) Overview

Apios americana is a nitrogen-fixing twining vine native to eastern North America whose small, starchy tubers were an important food source for Indigenous peoples and early European colonists, earning it the name groundnut.

help Apios americana (Groundnut) FAQ

Can Apios americana tubers be eaten raw?

The tubers should be cooked because heat deactivates naturally occurring protease inhibitors. Cooked groundnut has a dense, potato-like texture with a noticeably nutty flavor.

How are American groundnut tubers arranged underground?

The plant forms strings of bead-like tubers along underground rhizomes rather than one compact potato cluster. Harvest carefully because small tubers left behind can regenerate the perennial vine.

Does Apios americana really add nitrogen to the soil?

Yes, it is a legume that forms a nitrogen-fixing relationship with root bacteria. That does not make it a tidy cover crop, however, because its twining stems and persistent tubers can spread through nearby vegetation.

What kind of support does Apios americana need?

Give it a fence, trellis, or other sturdy structure for its twining stems. The species naturally occurs in moist parts of eastern North America and can tolerate wetter soil than many common food vines.

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