Western Larkspur
Delphinium hesperium
Last reviewed: August 2026
Western larkspur is a low-water perennial forb of California grasslands and open woodlands, blooming from May through July with spikes of blue to violet flowers that attract bees, butterflies and hummingbirds.
Western Larkspur is toxic to dogs and cats.
Listed as toxic by the ASPCA Animal Poison Control Center (opens in new tab) (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
part sun
Water
low
Size
12"–48" H × 12"–24" W
Bloom
May, Jun, Jul
Native to
CA
Pollinators
bees, butterflies, hummingbirds
Before you buy
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Western larkspur is a beautiful native perennial with showy blue-purple spikes that bloom late spring through summer. It grows 1-4 feet tall with delicate, deeply lobed leaves and attracts numerous pollinators to the garden. It thrives in part sun conditions with low water requirements once established.
Growing Western Larkspur
Grow Western Larkspur in part sun and low water. Mature plants reach 12 to 48 inches tall and spread 12 to 24 inches wide. Expect moderate maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Western Larkspur is an HOA-friendly choice. Maintenance level: moderate. Tidiness: 3 out of 5.
Works well in: foundation, mid zone.
- Goes dormant and can look untidy after blooming
- May need staking in exposed areas
- Toxic if ingested, which could be a concern in family-oriented communities
Wildlife value
Western larkspur provides valuable nectar for bees, butterflies, and hummingbirds. The tubular flowers are particularly attractive to hummingbirds and long-tongued bees.
Common questions
- When does Western larkspur bloom?
- Western larkspur blooms from May through July, sending up tall spikes of blue to violet flowers above its basal leaves.
- What pollinators visit Western larkspur?
- Bees, butterflies and hummingbirds are regular visitors to Western larkspur, drawn to the nectar in its tubular spurred flowers during late spring and early summer.
- How much water does Western larkspur need?
- Western larkspur prefers low water once established, going dormant in summer as grassland and open woodland sites dry out.
- What light conditions does Western larkspur prefer?
- Western larkspur does best with part sun, such as open grassy slopes or the light shade found at the edges of oak woodlands.
- Is Western Larkspur toxic to dogs?
- Yes. Western Larkspur is listed as toxic to dogs by the ASPCA Animal Poison Control Center (aspca.org). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.
- Is Western Larkspur toxic to cats?
- Yes. Western Larkspur is listed as toxic to cats by the ASPCA Animal Poison Control Center (aspca.org). If your cat has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.
- Is Western Larkspur HOA-friendly?
- Western Larkspur is generally an HOA-friendly choice in the right placement, with moderate maintenance.
These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.
Native range data from vouchered herbarium specimen records 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 Western Larkspur and shows pet-safe natives for your ecoregion instead.
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