Ericaceae
White-flower rhododendron
Rhododendron albiflorum
Also known as Azaleastrum warrenii, Rhododendron albiflorum f. poikilon, Azaleastrum albiflorum, Azaleastrum albiflorum subsp. warrenii
Flowering Plants · Native Plants · Trees & Shrubs · Rhododendron · Native Shrub · Ericaceae · Mountain Garden · White Flowers · Acidic Soil · Subalpine · Woodland Shrub · Part Shade · Pacific Northwest
White-flower rhododendron is a challenging but rewarding native shrub that demands cool, acidic, consistently moist, and well-drained soil rich in organic matter. It is best suited to mountain or subalpine garden conditions and does not tolerate heat, drought, or alkaline soils. Amend planting sites generously with peat or pine bark and avoid disturbing the shallow root system.
Growing conditions
The details behind the basics
- Daily light
- 4 hours
- Watering
- Water deeply and consistently to keep soil evenly moist but never waterlogged; avoid allowing roots to dry out · Every 5-7 days
- Maintenance
- High
- Soil
- sandy loam
- Soil pH
- 4.5–6.5
- Temperature
- -25°F to 95°F
- Cycle
- Perennial
- Propagation
- Seed, Division, Cutting
Hardiness
USDA 4b-8b
Form & growth
Mature size and habit
- Mature height
- 2 ft – 6 ft
- Spread
- 5 ft
- Spacing
- 48 in apart
- Growth rate
- Moderate
- Root depth
- Medium
- Flowers
- Yes
- Foliage
- Coarse
Ecology & origin
Where it belongs and what it brings
- Native to
- Alberta, British Columbia, Colorado, Idaho, Montana, Oregon, Washington
- Attracts
- Bees, Butterflies, Hummingbirds
Sources: trefle, usda
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