Rhododendron Boldface

Boldface Rhododendron

Boldface (Rhododendron ‘Boldface’) is an evergreen azalea with white flowers. Its display arrives near the middle of the rhododendron flowering season, with the exact timing influenced by local weather. Individual flowers measure about 3 inches across. Wavy petal edges give the clusters additional texture. Contrasting red markings add detail within the flower faces.

The plant develops outward-spreading growth. Its foliage is retained through winter, keeping a leafy framework between flowering seasons. It can provide a flowering focal point within a mixed shrub border or woodland-edge planting.

Give it acidic, humus-rich soil that stays moist and drains freely. A sheltered position with filtered light or morning sun is a useful starting point; protect the roots from prolonged drying and keep mulch clear of the stems.

Size guide
• Height: About 4 ft at 10 years; growth continues afterward
• Width: Allow for the cultivar’s natural branch spread; a verified numerical spread is not available in this reference.

Hardiness
• Approximate cold tolerance: -5°F
• USDA cold-limit equivalent: Zone 6b
This equivalence is calculated from the published temperature rating. Local conditions and summer climate also affect performance.

Best Uses
• Border
• Woodland Gardens
• Accent Plant

Plant type

Broadleaf Evergreen, Evergreen Shrub, Flowering evergreen shrub

Height

4 ft+

Width

4-6 '

Hardiness zones

6b–8

Sunlight

Part shade

Growth rate

Slow

Bloom time

Spring to summer

Flower color

White

Leaf color

Green

Fall color

Dark Green

Soil

Acidic, Humus rich, Moist well-drained

Landscape use

Accent Plant, Border, Woodland Gardens

Shape

Spreading

Bark

Smooth

Fruit

No

Fragrant

No

Deer resistant

No

Salt tolerant

No

Drought tolerant

No

10-year height

4 ft