Douglas spirea
Spiraea douglasii
About this plant
Douglas spirea is a deciduous shrub known for its clusters of small pink flowers that bloom in summer. It has arching branches and toothed leaves, making it attractive in natural landscapes and gardens. It is often used for erosion control and wildlife habitat due to its dense growth and nectar-rich flowers.
Taxonomy
- Genus
- Spiraea
- Family
- Rosaceae
- Higher classification
- Rosales
- Plant type
- Shrub
- Lifespan
- Perennial
Origin & Distribution
- Native region
- Western North America
- Distribution
- Native to western North America, commonly found from Alaska to California and eastward to Montana. It is also cultivated in gardens in temperate regions.
Care
- Light preference
- Full sun
- Suitable locations
- Outdoor, Balcony, Greenhouse
- Watering frequency
- Moderate
- Watering interval
- 3–10 days
- Humidity
- Normal
- Minimum
- -40 °C
- Maximum
- 30 °C
- Optimal
- 15-25 °C
- USDA hardiness zones
- 4-8
- Soil pH
- 5.5-7.5
- Soil type
- well-draining loam, moist soils
Watering. Keep soil consistently moist, especially during the first growing season. Once established, it tolerates short dry spells but prefers regular watering.
Fertilizing. Apply a balanced, slow-release fertilizer in early spring to support healthy growth. Avoid over-fertilizing, which can reduce flowering.
Spiraea douglasii is a hardy shrub that grows well in full sun and tolerates a variety of soil types. It requires moderate watering and is generally low maintenance. Pruning after flowering helps maintain its shape and encourages healthy growth.
Propagation
- Propagation methods
- Cuttings, Division, Seeds
- Care difficulty
- Easy
Ornamental features
- Flowering
- Yes
- Flowering period
- summer
Clusters of pink flowers, arching branches, and attractive green foliage that turns yellow in fall.
Toxicity & Safety
- Toxic to humans
- Non-toxic
- Toxic to pets
- Non-toxic
- Weed potential
- Low spread
Non-toxic to humans and pets, safe to have around children and animals.
Allergy information
- Allergy risk
- Low
- Allergy triggers
- Pollen
- Pollen level
- Moderate
Spiraea douglasii can produce pollen that may cause mild allergic reactions in sensitive individuals, especially during its flowering season. People with pollen allergies should limit close contact during this time to reduce symptoms like sneezing or itchy eyes.
Common problems
If overwatered or planted in poorly draining soil, it may develop root rot. Lack of sunlight can cause weak growth and fewer flowers. Occasionally, aphids or spider mites may appear but are usually manageable.
Uses
Used as an ornamental shrub in gardens and natural landscaping. It helps with erosion control and provides nectar for pollinators like bees and butterflies.
Notes
Prune after flowering to prevent the shrub from becoming too leggy. It can spread by suckers, so monitor if you want to control its size. Prefers moist soils but can tolerate occasional dry periods once established.