Large-flower Tickseed
Coreopsis grandiflora
Last reviewed: June 2026
Coreopsis grandiflora is a native wildflower producing bright yellow daisy-like blooms from June through September across much of the eastern and central United States.
Large-flower Tickseed (Coreopsis grandiflora) is not on the ASPCA Animal Poison Control Center toxic plant list for dogs or cats (aspca.org (opens in new tab), last reviewed 2026-05-21). If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
full sun
Water
low
Size
12"–24" H × 12"–18" W
Bloom
Jun, Jul, Aug, Sep
Native to
AL, AR, CT, FL and 27 more states
Pollinators
bees, butterflies
Browse plants for this ecoregion
Large-flower tickseed produces bright yellow daisy-like flowers from June through September on compact, bushy plants. This drought-tolerant native perennial forms neat clumps that work well in sunny borders and naturalized areas. The cheerful blooms provide long-lasting color with minimal care requirements.
Growing Large-flower Tickseed
Grow Large-flower Tickseed in full sun and low water. Mature plants reach 12 to 24 inches tall and spread 12 to 18 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Large-flower Tickseed is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.
Works well in: front yard, foundation, street edge, mid zone.
- May self-seed if not deadheaded regularly
Wildlife value
The abundant flowers attract numerous bees and butterflies throughout the growing season. Seeds provide food for goldfinches and other small birds in fall.
Common questions
- When does Large-flower Tickseed bloom?
- Coreopsis grandiflora typically blooms from June through September, producing cheerful yellow flowers throughout the summer and early fall months.
- What pollinators visit Coreopsis grandiflora?
- Large-flower Tickseed attracts various bees and butterflies with its nectar-rich yellow flowers, making it valuable for pollinator gardens.
- Where is Coreopsis grandiflora native?
- This wildflower is native to much of the eastern and central United States, from Maine south to Florida and west to New Mexico and Iowa.
- What growing conditions does Large-flower Tickseed prefer?
- Coreopsis grandiflora thrives in full sun with low to moderate water needs, making it an excellent choice for drought-tolerant gardens and naturalized areas.
- Is Large-flower Tickseed toxic to dogs?
- Large-flower Tickseed is not on the ASPCA Animal Poison Control Center toxic plant list for dogs (aspca.org).
- Is Large-flower Tickseed toxic to cats?
- Large-flower Tickseed is not on the ASPCA Animal Poison Control Center toxic plant list for cats (aspca.org).
- Is Large-flower Tickseed HOA-friendly?
- Large-flower Tickseed is generally an HOA-friendly choice in the right placement, with low maintenance.
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 Large-flower Tickseed? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Not sure where to start? Take the 2-minute yard quiz