Rhododendron ‘Horizon Monarch’

hybrid rhododendron

Outstanding Qualities

In early May the large, leathery, deep green leaves of this handsome rhododendron are embellished with scarlet-orange buds which open to reveal gigantic trusses of creamy yellow flowers with a diminutive splash of red inside the base of each flower.

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.

© Richie Steffen / Great Plant Picks

Quick Facts

Plant Type: shrub

Foliage Type: evergreen

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

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

Hardiness: USDA Zones 7 to 9

Flower Color: yellow

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

Water Requirements: frequent to regular watering