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.

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: August 2026

Toxicity unknown

Rattlebox (Crotalaria spectabilis) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.

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

Pollinators

bees, butterflies

Native alternatives to Rattlebox

Rattlebox is not native to the United States. These natives fill a similar role in a planting, matched on bloom season, bloom color and mature size.

Before you buy

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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.
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.

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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