Scarlet Monkeyflower
Erythranthe cardinalis
Last reviewed: July 2026
Erythranthe cardinalis (Scarlet Monkeyflower) is a striking red-flowered native forb found in California, Nevada, Oregon, and Washington that blooms from May through September in wet areas.
Scarlet Monkeyflower (Erythranthe cardinalis) 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
part sun
Water
high
Size
12"–48" H × 12"–24" W
Bloom
May, Jun, Jul, Aug, Sep
Native to
CA, NV, OR, WA
Pollinators
hummingbirds, bees
Browse plants for this ecoregion
Scarlet monkeyflower is a vibrant perennial with bright red tubular flowers that bloom from late spring through early fall. It thrives in moist areas and partial shade, growing 1-4 feet tall with a compact habit. This native wildflower adds a striking vertical accent to garden beds.
Growing Scarlet Monkeyflower
Grow Scarlet Monkeyflower in part sun and high 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
Scarlet Monkeyflower is an HOA-friendly choice in the right placement. Maintenance level: moderate. Tidiness: 3 out of 5.
Works well in: foundation, mid zone.
- Requires consistent moisture which can create maintenance challenges
- May look untidy without regular grooming
- Can spread beyond intended areas if conditions are favorable
Wildlife value
Scarlet monkeyflower is highly attractive to hummingbirds with its red tubular blooms designed for their long beaks. Bees also visit the flowers for nectar and pollen resources.
Common questions
- Where does Scarlet Monkeyflower naturally grow?
- Erythranthe cardinalis is native to California, Nevada, Oregon, and Washington, typically found along streams, seeps, and other consistently moist habitats.
- When does Scarlet Monkeyflower bloom?
- This plant produces its brilliant red tubular flowers from May through September, with peak blooming often occurring in summer months.
- What pollinators visit Scarlet Monkeyflower?
- The bright red tubular flowers are primarily adapted for hummingbird pollination, though bees also visit the blooms for nectar and pollen.
- What growing conditions does Scarlet Monkeyflower need?
- This plant requires consistently moist to wet soil conditions and can tolerate full sun to partial shade, making it ideal for bog gardens or stream margins.
- Is Scarlet Monkeyflower toxic to dogs?
- Scarlet Monkeyflower is not on the ASPCA Animal Poison Control Center toxic plant list for dogs (aspca.org).
- Is Scarlet Monkeyflower toxic to cats?
- Scarlet Monkeyflower is not on the ASPCA Animal Poison Control Center toxic plant list for cats (aspca.org).
- Is Scarlet Monkeyflower HOA-friendly?
- Scarlet Monkeyflower is generally an HOA-friendly choice in the right placement, with moderate 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 Scarlet Monkeyflower? 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