Boursault Rhododendron
Boursault Rhododendron (Rhododendron catawbiense 'Boursault')
Boursault Rhododendron (Rhododendron catawbiense 'Boursault') is a robust, broadleaf evergreen shrub admired for its dense growth habit and bold violet-lavender flower clusters. With strong cold hardiness and reliable bloom performance, this cultivar brings vibrant color and year-round presence to partially shaded gardens in northern and mountain climates.
Distinctive Features
'Boursault' typically reaches 6 to 10 feet tall and wide, forming a rounded to slightly upright shape with thick, leathery, dark green leaves. In mid to late spring, it produces large trusses of soft violet-purple flowers with faint yellow blotches. A selection of the Appalachian-native Catawba Rhododendron, it is known for its toughness, making it an excellent structural and seasonal accent in acidic garden soils.
Growing Conditions
- Sun Exposure: Partial shade; tolerates morning sun in cooler regions
- Soil Type: Moist, well-drained, humus-rich soil
- Soil pH: Acidic
- Water Needs: Moderate; consistent watering preferred
- USDA Hardiness Zones: 4 to 8
Ideal Uses
- Focal point in shaded woodland borders or large beds
- Massed for seasonal interest along woodland edges
- Evergreen screen or informal hedge in acidic soil areas
- Anchor in mixed rhododendron groupings or native plantings
- Backdrops for pollinator and spring-bloom gardens
Low Maintenance Care
- Mulch annually to maintain moisture and root health
- Prune after bloom to shape and remove spent trusses
- Water during summer droughts, especially while establishing
- Fertilize in early spring with acid-specific plant food
- Protect from drying winter winds in exposed sites
Why Choose Boursault Rhododendron
- Soft violet-lavender blooms add richness to spring gardens
- Evergreen foliage gives structure and year-round appeal
- Cold-hardy and well-suited to challenging climates
- Excellent for woodland gardens and traditional plantings
- A striking focal point for shaded foundations and borders
Boursault Rhododendron delivers bold seasonal color, reliable evergreen form, and lasting resilience�making it an excellent focal point in cool-climate landscapes with acidic soil.
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