Rattlebox
Crotalaria spectabilis
Last reviewed: June 2026
Light
full sun
Water
low
Size
12"–36" H × 12"–24" W
Bloom
Jun, Jul, Aug, Sep
Native to
AL, AR, FL, GA and 14 more states
Pollinators
bees, butterflies
Rattlebox is a tall annual wildflower that produces bright yellow pea-like flowers from summer through fall. This upright plant grows quickly and self-seeds readily, making it better suited for naturalized areas than formal landscapes.
In an HOA neighborhood
Rattlebox takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Plant contains toxic alkaloids that may concern HOAs
- Can appear weedy or wild in formal landscapes
- May self-seed aggressively
Wildlife value
The abundant yellow blooms attract bees and butterflies throughout the long flowering season. However, all parts of this plant are toxic to humans and livestock.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Does Rattlebox fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.