Crotalaria
Crotalaria spp.
Crotalaria, known as Rattlebox, features bright yellow pea-like flowers and distinctive seed pods that rattle when dry. While some species are beneficial cover crops, others are invasive and toxic, symbolizing both agricultural promise and cautionary vigilance.
Fabaceae (Legume family)
Summer to fall (June to November, peak in late summer)
Symbolism & Meanings
Key Meanings
Perfect For
Color Meanings
Cultural Significance
Crotalaria represents the complex relationship between humans and introduced species. Some species were brought as beneficial cover crops for their nitrogen-fixing abilities, while others became problematic invasives. The rattling seedpods serve as a natural warning system—both literally sounding an alarm and symbolically reminding us to carefully consider the consequences of introducing non-native species.Shop Our Floral Collection
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Physical Characteristics
Natural Habitat
Growing Guide
Sunlight
Full sun to partial shade; best growth in full sun
Water
Tolerates dry conditions; minimal watering needed once established
Soil
Well-drained, Sandy, Gravelly, Poor to moderately fertile, Wide pH tolerance
Expert Growing Tips
WARNING: Many species are toxic to livestock and can be invasive
Check local regulations before planting
Fixes nitrogen in soil, improving fertility
Inflated seed pods rattle when dry, giving the common name
Native species like C. sagittalis are valuable for butterflies
Uses & Benefits
Ornamental Uses
- Native plant gardens (native species only)
- Pollinator gardens (attracts bees and butterflies)
- Educational plantings about invasive species
- Cover crops and green manure (specific non-invasive species)
Traditional Uses
- Some species used in traditional medicine (consult experts)
- WARNING: Contains toxic alkaloids (monocrotaline) harmful to livestock
- Not recommended for home medicinal use
Disclaimer: Information provided is for educational purposes only. Consult healthcare professionals before using any plant medicinally.
Further Reading
Frequently Asked Questions about the Crotalaria
are crotalaria plants toxic?
Yes, most Crotalaria species contain toxic alkaloids (monocrotaline) that are dangerous to horses, livestock, and other animals. All parts of the plant contain toxins, with seeds having the highest concentration.
why is crotalaria called rattlebox?
Crotalaria is called Rattlebox because its dried, inflated seed pods contain loose seeds that rattle when the pods are shaken or moved by the wind.
is crotalaria good for soil?
Yes, Crotalaria fixes nitrogen in the soil, improving fertility. Some species were historically used as green manure cover crops for this purpose.
are crotalaria invasive?
Some Crotalaria species (like C. spectabilis) are invasive in many regions, spreading aggressively and competing with native vegetation. Native species are not invasive.
Available Colors
Quick Facts
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