- Category
- Forb / Wildflower
- Sun
- Full
- Soil moisture
- Medium-Dry to Dry
- Bloom time
- Jul–Sep
- Bloom color
- Yellow
- Notes
- Annual, Acidic soil, Sand
About Rattlebox
Rattlebox is a fascinating and distinctive annual legume that adds a touch of curiosity to sandy, sun-drenched landscapes. This low-growing plant, typically reaching 4 to 16 inches in height, features hairy stems and simple, arrow-shaped leaves. In mid to late summer, it produces small, bright yellow pea-like flowers that eventually develop into inflated, blackish seed pods. As the pods dry, the seeds inside detach and rattle when shaken, giving the plant its charming common name. Native to much of the eastern and central United States, it thrives in dry, sandy prairies, fields, and roadsides. As a member of the bean family, it plays a vital role in soil health by fixing nitrogen. It is also an important host plant for the Bella Moth, whose caterpillars feed on the seeds. Rattlebox is a sun-lover that requires well-drained, even poor or acidic, sandy soils to flourish. It is a great choice for restoration projects or for gardeners looking to add a unique, ecologically significant species to a sandy wildflower meadow.
Native range
Native to 37 states:
County range map

Range map courtesy of BONAP (Biota of North America Program).
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