Scarlet Larkspur
Delphinium cardinale
Last reviewed: June 2026
Scarlet Larkspur is toxic to dogs and cats.
Listed as toxic by the ASPCA Animal Poison Control Center (last reviewed 2026-05-21). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435and your veterinarian's emergency line.
Pollinator Patch flags toxic plants so you can choose a pet-safe native alternative for your yard.
Light
full sun
Water
low
Size
24"–60" H × 12"–24" W
Bloom
Apr, May, Jun, Jul
Native to
CA
Pollinators
hummingbirds, bees
Browse plants for this ecoregion
Scarlet Larkspur is a striking native perennial with tall spikes of vibrant red flowers that bloom from spring through summer. The plant features delicate, lacy foliage and rises on slender stems to heights of 2-5 feet, creating a dramatic vertical accent in dry gardens.
In an HOA neighborhood
Scarlet Larkspur is an HOA-friendly choice in the right placement. Maintenance level: moderate. Tidiness: 2 out of 5.
Works well in: mid zone, backyard only.
- Tall flower stalks may look untidy after blooming
- Goes dormant and dies back in winter
- Can have a wild, less manicured appearance
Wildlife value
The tubular red flowers are excellent hummingbird attractants, while also supporting native bee populations as a valuable nectar source.
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.
Pollinator Patch flags toxic plants like Scarlet Larkspur and shows pet-safe natives for your ecoregion instead.