What is Grevillea 'Kings Rainbow' and what makes it unique?

Grevillea 'Kings Rainbow' is an evergreen shrub prized for its vibrant, multi-colored flowers ranging from deep red to bright yellow and orange. Its attractive, deeply lobed foliage and ability to thrive in a range of soil conditions make it a standout choice for landscaping.

How do I care for Grevillea 'Kings Rainbow'?

This low-maintenance shrub thrives in full sun to partial shade and prefers well-draining, sandy or loamy soil. Water deeply but infrequently after establishment, fertilize sparingly, and prune lightly after flowering to maintain its shape.

Is Grevillea 'Kings Rainbow' suitable for drought-prone or coastal gardens?

Yes, Grevillea 'Kings Rainbow' is highly tolerant of drought once established and is resilient to salt spray and wind, making it ideal for both xeriscape and coastal gardens.

Does Grevillea 'Kings Rainbow' attract wildlife to my garden?

Absolutely! The vibrant, tubular flowers of Grevillea 'Kings Rainbow' attract pollinators like birds and bees. It also provides shelter and food for small birds and mammals, enhancing your garden's biodiversity.

What is the mature size of Grevillea 'Kings Rainbow' and how can I use it in landscaping?

Grevillea 'Kings Rainbow' grows to approximately 6-10 feet tall and wide. It can be used as an accent plant, in container gardening, as a hedge or screen, or as a highlight in water-wise, Mediterranean, or wildlife gardens.

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Bonte Farm

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

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Grevillea ‘Kings Rainbow’

Grevillea ‘Kings Rainbow’ is a striking, medium-large hybrid known for its multicolored blooms and finely textured leaves. It shows long toothbrush-style flowers in vivid coral, pink, apricot, and golden yellow—a rainbow gradient that shifts with age and temperature. Bright blossoms appear during much of the year, bringing vibrant color and pollinator activity to native and modern gardens. Its lush, divided leaves provide a soft, fern-like backdrop that highlights the flowers’ brilliance.

This cultivar thrives in full sun with well-drained soil and adapts well to Mediterranean, coastal, and drought-tolerant gardens. It endures heat and dry climates with resilience while building a dense, rounded shape. Suitable as a feature shrub or informal screen, it grows moderately fast. Gardeners value it for its long blooming season and its ability to attract hummingbirds and bees. Whether planted singly or in mixed beds, it adds dynamic color, texture, and low-maintenance charm.

Botanical Characteristics

Characteristic	Detail
Scientific Name	Grevillea hybrid ‘Kings Rainbow’
Common Name(s)	Kings Rainbow Grevillea
Growth Habit	Medium to large evergreen shrub with an upright to arching form
Foliage	Deeply divided, fine-textured, soft green leaves
Flowers / Bracts	Coral, pink, apricot, and golden-yellow toothbrush-style flowers
Flowering Season	Nearly year-round with peak bloom from winter through summer
Special Features	Drought tolerant, prolific bloomer, wildlife-attracting, and low maintenance

Mature Size and Form of Grevillea ‘Kings Rainbow’

This cultivar typically reaches 6–10 ft tall (1.8–3 m) with a similar spread. It forms a softly arching, full shrub with dense foliage. Light pruning after flowering encourages tighter form and more blooms. Without pruning, it takes on a looser, natural appearance fitting informal landscapes.

USDA Hardiness Zone Recommendations

Grevillea ‘Kings Rainbow’ performs best in USDA Zones 9–11. These warm zones with mild winters suit coastal, Mediterranean, and dry-summer inland areas. Excellent drainage supports cold tolerance and overall plant health.

Cultivation and Care for Grevillea

Aspect	Care Instructions
Sunlight	Full sun encourages strong flowering and compact shape
Soil	Prefers well-drained sandy or loamy soils; avoid heavy clay
Water	Low to moderate watering; drought tolerant once established
Fertilizer	Use native-plant fertilizers low in phosphorus
Pruning	Light pruning post-flowering improves shape and bloom density

Landscape Use and Benefits

• Excellent feature shrub in open beds
• Produces colorful, extended-season flowers
• Attracts wildlife, especially hummingbirds
• Great for Mediterranean, coastal, and water-wise gardens
• Combines well with other Grevilleas, Leucadendrons, Banksias, and grasses

This shrub’s multicolor blooms add warmth and vibrancy to any garden palette.

Wildlife Attraction

It draws hummingbirds, bees, butterflies, and nectar feeders. The dense foliage also shelters small birds, boosting garden biodiversity.

Pest and Disease Resistance

This cultivar is generally hardy and reliable. Potential problems include root rot in poorly drained soils, sensitivity to high-phosphorus fertilizers, and occasional scale or aphid infestations. Good drainage and suitable fertilizers maintain long-term health.