How much sun does Rattlebox need?

Rattlebox grows best in full sun conditions.

When does Rattlebox bloom?

Rattlebox blooms in June, July, August, and September.

Where is Rattlebox native?

Rattlebox (Crotalaria spectabilis) is native to AL, AR, FL, GA and 14 more states, per the USDA PLANTS Database and regional native plant society lists.

Is Rattlebox toxic to livestock?

Rattlebox is listed as toxic to grazing livestock such as cattle, sheep, and goats (moderate severity) by the USDA PLANTS Database. This is separate from pet (dog and cat) toxicity.

What pollinators does Rattlebox attract?

Rattlebox draws bees and butterflies.

Is Rattlebox HOA-friendly?

Rattlebox takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Rattlebox

Name: Pollinator Patch
Author: Pollinator Patch

Crotalaria spectabilis

Last reviewed: June 2026

Rattlebox is listed as toxic to grazing livestock (cattle, sheep, and goats) at a moderate level by the USDA PLANTS Database (opens in new tab). This is a livestock indicator and is separate from pet toxicity.

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.

Common questions

How much sun does Rattlebox need?: Rattlebox grows best in full sun conditions.
When does Rattlebox bloom?: Rattlebox blooms in June, July, August, and September.
Where is Rattlebox native?: Rattlebox (Crotalaria spectabilis) is native to AL, AR, FL, GA and 14 more states, per the USDA PLANTS Database and regional native plant society lists.
Is Rattlebox toxic to livestock?: Rattlebox is listed as toxic to grazing livestock such as cattle, sheep, and goats (moderate severity) by the USDA PLANTS Database. This is separate from pet (dog and cat) toxicity.
What pollinators does Rattlebox attract?: Rattlebox draws bees and butterflies.
Is Rattlebox HOA-friendly?: Rattlebox takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

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.

Ready to grow Rattlebox? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.

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