Rhododendron Holden

Holden Rhododendron

Holden (Rhododendron ‘Holden’) is an evergreen rhododendron with red flowers. Its display arrives in the early-to-middle part of the rhododendron flowering season, with the exact timing influenced by local weather. Individual flowers measure about 2½ inches across. The flower tubes widen into flared faces that display the color clearly. Contrasting dark red markings add detail within the flower faces.

The plant develops a rounded outline and a dense crown. The dark green leaves have a glossy surface that gives the foliage a distinct presence 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. Protect the foliage from strong afternoon sun.

Size guide
• Height: About 3 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: -15°F
• USDA cold-limit equivalent: Zone 5b
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

3 ft+

Width

3'

Hardiness zones

5b–8

Sunlight

Part shade

Bloom time

Spring to summer

Flower color

Red

Leaf color

Dark Green

Fall color

Green

Attracts

Butterflies

Soil

Acidic, Humus rich, Moist well-drained

Landscape use

Accent Plant, Border, Woodland Gardens

Shape

Dense, Rounded

Fruit

No

Fragrant

No

Deer resistant

Yes

Salt tolerant

No

Drought tolerant

No

10-year height

3 ft