Marin Iris
Iris douglasiana
Last reviewed: September 2026
Iris douglasiana, the Marin Iris, produces lavender to purple blooms from March through May and holds its tough, grass like leaves year round in coastal grasslands and open woodlands.
Marin Iris 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 shade
Water
medium
Size
6"–18" H × 12"–24" W
Bloom
Mar, Apr, May
Native to
CA, OR
Pollinators
bees, butterflies
Before you buy
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Marin iris is an elegant native perennial with attractive sword-like evergreen foliage. It produces showy purple, lavender, or occasionally white flowers in spring, creating a refined accent in partially shaded gardens.
Growing Marin Iris
Grow Marin Iris in part shade and medium water. Mature plants reach 6 to 18 inches tall and spread 12 to 24 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Marin Iris is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.
Works well in: front yard, foundation, street edge, mid zone.
- May need occasional grooming to remove spent flower stalks
Wildlife value
Marin iris flowers attract native bees and butterflies during its spring bloom period, providing valuable early-season nectar.
Common questions
- When does Iris douglasiana bloom?
- Iris douglasiana typically flowers from March through May, with individual clumps often producing multiple stalks during the peak weeks of the season.
- How much water does Marin Iris need?
- This iris does best with medium moisture during its active growth and bloom period, then tolerates drier conditions once established, reflecting the wet winter and dry summer pattern of its coastal grassland habitat.
- Does Marin Iris stay green all year?
- Yes, its stiff, sword shaped leaves are evergreen and persist through the winter, giving the plant structure in the garden even when it is not in bloom.
- What pollinators visit Iris douglasiana flowers?
- Bees and butterflies are the main visitors, drawn to the large purple to lavender blooms during the spring flowering period.
- How much light does Iris douglasiana prefer?
- It grows well in part shade and also tolerates part sun to full sun, especially in cooler coastal locations where fog moderates summer heat.
- Is Marin Iris toxic to dogs?
- Yes. Marin Iris 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 Marin Iris toxic to cats?
- Yes. Marin Iris 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 Marin Iris HOA-friendly?
- Marin Iris is generally an HOA-friendly choice in the right placement, with low 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.
If something looks wrong
Common plant problems, and what to check first
These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.
- It is dying right after planting
- Leaves turning yellow
- Wilting even though I watered it
- Brown crispy leaf tips
- Bugs on the plant
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