Rhododendron ‘Blue Boy’

hybrid rhododendron

  • © American Rhododendron Society

Outstanding Qualities

Purple often ignites passion in the garden – some gardeners adore this color while others really don't care for it. If you love purple, this is one of the best cultivars. A heavy blooming, upright and open growing, well-shaped plant, Rhododendron 'Blue Boy' has relatively long, narrow, dark green leaves. The funnel-shaped flowers are vibrant violet with wavy edges and a purple-black blotch. They are held in a tight, rounded truss with up to 20 flowers per truss. It is sun tolerant.

Quick Facts

Plant Type: shrub

Foliage Type: evergreen

Plant Height: 5 ft. 0 in. (1.52 meters)

Plant Width/Spread: 5 ft. 0 in. (1.52 meters)

Plant Height-Mature: 15 ft. 0 in. (4.57 meters)

Plant Width-Mature: 12 ft. 0 in. (3.66 meters)

Hardiness: USDA Zones 6 to 9

Flower Color: violet

Sun/Light Exposure: full sun to light or open shade

Water Requirements: frequent to regular watering

Seasonal Interest: stunning violet flowers with dark purple-black blotch in late 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.