Douglas Iris
Iris douglasiana
Also listed as Iris beecheyana, Iris watsoniana
Also known as Pacific Coast Iris, Marin Iris
Climate Match for your location
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A California native iris with blue-purple, violet, or yellow flowers and narrow, evergreen foliage that thrives in dry, sunny conditions. Excellent for drought-tolerant gardens and coastal landscapes.
Why grow it
Douglas iris is a reliable choice for gardeners seeking a native iris adapted to California's Mediterranean climate. It outperforms many non-native ornamental irises in drought tolerance once established and requires minimal fertilizer or supplemental water in suitable sites. The evergreen foliage provides year-round structure, and its modest height (12-24 inches) makes it useful as a foreground planting in dry gardens or coastal areas where salt spray limits other iris options.
Watch out for
Plants may take 2-3 years to reach mature size and full flowering capacity. In heavy clay soils with poor drainage, root rot can develop, particularly in areas receiving winter rain without adequate slope or amendment. Flower color can vary unpredictably within seed-grown populations, so nursery-propagated plants are more reliable if specific color is desired.
Overview
- Form
- Growth Rate
- Size
- Dormancy
- Family
- Iridaceae
Native to the United States
Native Range
California native
Native to: California, Oregon
Seasonality
Bloom Season
Season of Interest
Notable Cultivars
Pacific Coast Hybrid irises are the most widely grown group, available in lavender, gold, and bicolor forms and bred for improved vigor and extended color range beyond the parent species.
Ground cover
Low spreading plants that carpet the soil.
Succession Role
Tolerances & Soil
Establishment & Care
- Establishment
- Maintenance
- Propagation
A California native iris with blue-purple, violet, or yellow flowers and narrow, evergreen foliage that thrives in dry, sunny conditions. Excellent for drought-tolerant gardens and coastal landscapes.
Climate Match for your location
See how well Douglas Iris grows in your area.
Enter your ZIP code and we'll show you how this plant fits your local climate.
Why grow it
Douglas iris is a reliable choice for gardeners seeking a native iris adapted to California's Mediterranean climate. It outperforms many non-native ornamental irises in drought tolerance once established and requires minimal fertilizer or supplemental water in suitable sites. The evergreen foliage provides year-round structure, and its modest height (12-24 inches) makes it useful as a foreground planting in dry gardens or coastal areas where salt spray limits other iris options.
Watch out for
Plants may take 2-3 years to reach mature size and full flowering capacity. In heavy clay soils with poor drainage, root rot can develop, particularly in areas receiving winter rain without adequate slope or amendment. Flower color can vary unpredictably within seed-grown populations, so nursery-propagated plants are more reliable if specific color is desired.
Overview
- Form
- Growth Rate
- Size
- Dormancy
- Family
- Iridaceae
Native to the United States
Native Range
California native
Native to: California, Oregon
Seasonality
Bloom Season
Season of Interest
Ground cover
Low spreading plants that carpet the soil.
Succession Role
Tolerances & Soil
Establishment & Care
- Establishment
- Maintenance
- Propagation
Similar ground covers you might consider:
Enter your ZIP code to see top native species and strong climate fits for you.
Companion Planting
Plants well with
Notable Cultivars
Pacific Coast Hybrid irises are the most widely grown group, available in lavender, gold, and bicolor forms and bred for improved vigor and extended color range beyond the parent species.