Grevillea 'Kings Rainbow': Multicolored Blooms in Vivid Red, Orange, and Gold

🌈 Grevillea ‘Kings Rainbow’
Red, Orange & Yellow Multi‑Color Flowering Grevillea

Grevillea ‘Kings Rainbow’ is a vibrant, fast‑growing evergreen shrub celebrated for its spectacular multicolored blooms and bold garden presence. The long toothbrush‑style flowers display a dynamic blend of red, orange, yellow, and coral hues, often showing several colors within a single flower cluster. This ever‑changing palette creates constant movement and visual excitement across the landscape.

Set against finely divided, rich green foliage, the vivid blooms of ‘Kings Rainbow’ make this cultivar a true focal point in the garden. Its upright, open habit and strong flowering performance make it well suited to feature plantings, informal screening, and wildlife‑friendly landscapes. This cultivar is a standout addition to our Grevillea collection, prized for its intense color range and adaptability.

Botanical Characteristics of Grevillea ‘Kings Rainbow’

Mature Size and Form

• Height: 8–15 ft
• Spread: 8–12 ft

Grevillea ‘Kings Rainbow’ develops into a tall, open shrub with gracefully arching branches and an energetic silhouette. Its size and vigor make it ideal for screening, backdrops, and large landscape spaces. Light pruning after flowering helps shape the plant and maintain dense growth.

USDA Hardiness Zones

Zones 9–11

Best suited to warm, frost‑light regions with full sun, good air circulation, and well‑drained soils.

Cultivation and Care for Grevillea ‘Kings Rainbow’

Helpful resources for successful establishment:
Quick Tip: Caring for a Newly Unboxed Protea in Humid Conditions
Complete Protea & Grevillea Care Guide

Landscape Use and Benefits of Grevillea ‘Kings Rainbow’

• High‑impact feature shrub with dramatic multicolor blooms
• Ideal for Mediterranean, coastal, and water‑wise landscapes
• Excellent for screening, wildlife gardens, and large backdrops
• Strong attraction for birds, bees, and pollinators
• Fast growth fills space quickly with color and texture

Wildlife Attraction

The nectar‑rich flowers are highly attractive to birds and pollinators, making this grevillea a lively and ecologically valuable addition to the garden.

Pest and Disease Considerations

Grevillea ‘Kings Rainbow’ is generally hardy and low‑maintenance when grown in suitable conditions. Potential issues include:

• Root rot in poorly drained soils
• Leaf yellowing from phosphorus‑heavy fertilizers
• Minor frost damage in colder microclimates

Good drainage, full sun, and low‑phosphorus nutrition ensure long‑term garden success.