Rhododendron ‘Capistrano’

hybrid rhododendron

  • © Briggs Plant Propagators

  • © American Rhododendron Society

Outstanding Qualities

Yellow rhododendrons add warmth to the garden. While good yellow cultivars are less common than those of other colors, the GPP Rhododendron Advisory Committee recommends five cultivars for the coastal Pacific Northwest. 'Capistrano' has delicate pastel yellow flowers with no markings. Its mid-May flowers are funnel shaped, to 2 inches across, with frilly edges. Each dome-shaped truss has up to 15 flowers. Its leaves are 4.5 inches long and a muted deep green. They are retained on the plant for two to three years, which gives R. 'Capistrano' its dense, mounding habit.

Quick Facts

Plant Type: shrub

Foliage Type: evergreen

Plant Height: 4 ft. 0 in. (1.22 meters)

Plant Width/Spread: 4 ft. 0 in. (1.22 meters)

Plant Height-Mature: 10 ft. 0 in. (3.05 meters)

Plant Width-Mature: 10 ft. 0 in. (3.05 meters)

Hardiness: USDA Zones 5 to 9

Flower Color: yellow

Sun/Light Exposure: light or open shade

Water Requirements: frequent to regular watering

Seasonal Interest: delicate pastel yellow flowers in spring

Wildlife Associations: bees, hummingbirds

Colors & Combos

Great Color Contrasts: cream, silver, gold

Great Color Partners: bronze, dark green, chartreuse

Culture Notes
This rhododendron is easy to grow in the Pacific Northwest. Plant it in rich well-drained or sandy soil in a location with full sun to light or open shade. Rhododendrons are shallow-rooted plants requiring regular watering during dry weather. Faded flowers can be removed to give a cleaner look and new growth can be pinched to help make young plants bushier. Adult root weevils can chew on their leaves, but this is less of a problem on plants that receive more light and regular watering.