Rhododendron Cannons Double

Cannon's Double Azalea

Cannon's Double (Rhododendron ‘Cannon's Double’) is a deciduous azalea with yellow flowers. Its display arrives in the later part of the rhododendron flowering season, with the exact timing influenced by local weather. Individual flowers measure about 2½ inches across. Extra petals give the individual flowers a double form. Wavy petal edges give the clusters additional texture. The flowers are fragrant. Clusters commonly carry about 7-8 blossoms.

The plant develops an open branch structure. The shrub sheds its leaves for winter, making its seasonal foliage and flower display especially noticeable. 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 5 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

Deciduous Shrub, Flowering Deciduous Shrub

Height

5 ft+

Width

4'-8'

Hardiness zones

5b–8

Sunlight

Part shade

Bloom time

Spring to summer

Flower color

Yellow

Leaf color

Green

Fall color

Orange, Red, Yellow

Attracts

Butterflies

Soil

Acidic, Humus rich, Moist well-drained

Landscape use

Accent Plant, Border, Woodland Gardens

Shape

Open Canopy

Bark

Smooth

Fruit

No

Fragrant

Yes

Deer resistant

No

Salt tolerant

No

Drought tolerant

No

10-year height

5 ft