What growing conditions does Grevillea 'Kings Celebration' require?

Grevillea 'Kings Celebration' thrives in full sun and prefers well-draining, sandy or loamy soil. It is drought-tolerant once established, making it ideal for Mediterranean climates and water-wise gardens. Regular watering during dry periods and a balanced slow-release fertilizer in spring will keep it healthy and blooming.

How large does Grevillea 'Kings Celebration' grow and how can it be used in landscaping?

This evergreen shrub typically reaches 6-10 feet tall and wide at maturity. Grevillea 'Kings Celebration' can be used as a stunning specimen plant, a hedge or screen, or even grown in containers with good drainage. Its vibrant red and yellow flowers add a royal display of color to any landscape, and its fine, needle-like foliage pairs well with coarser-textured plants.

Is Grevillea 'Kings Celebration' low-maintenance and safe for wildlife?

Yes, Grevillea 'Kings Celebration' is a low-maintenance shrub that is generally resilient to pests and diseases. It attracts pollinators like birds and bees, provides habitat for native wildlife, and can tolerate coastal conditions including salt spray. Light pruning after flowering helps maintain its shape and encourages new growth.

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Grevillea 'Kings Celebration': A Royal Display of Color Blooms

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🏆 Grevillea 'Kings Celebration': The Large, Resilient, Ruby-Red Bloom

The Grevillea 'Kings Celebration' is a spectacular, large-growing Australian native shrub or small tree prized for its robust vigor and phenomenal, year-round display of large, intense ruby-red flowers. This high-performance hybrid is celebrated for its extended blooming season and its ability to provide dramatic, consistent color when many other plants are dormant. It is a highly effective, low-maintenance choice for large hedges, screens, and as a commanding specimen plant in water-wise gardens. Its abundant nectar production makes it an exceptional wildlife magnet, drawing in hummingbirds and nectar-feeding birds for a vibrant garden experience.

Botanical Characteristics

Characteristic	Detail
Scientific Name	Grevillea 'Kings Celebration' (Hybrid Cultivar)
Common Names	Grevillea, Spider Flower (common genus name), Kings Celebration Grevillea.
Growth Habit	A vigorous, upright, and dense evergreen shrub or small, fast-growing tree with a broad, rounded canopy.
Foliage	Features attractive, finely divided, dark green, fern-like leaves that provide a rich, contrasting backdrop for the bright flowers.
Flowers	Large, dense, toothbrush-style racemes up to 6 inches long. The color is a deep, uniform ruby-red to scarlet, delivering high-impact color.
Flowering Season	Known for its exceptionally prolonged and heavy bloom, flowering most heavily from late fall through spring but often continuing with scattered blooms year-round.
Nectar	Produces a copious amount of sweet, clear nectar, which is the primary reason for its popularity among wildlife.

Mature Size

'Kings Celebration' is one of the larger Grevillea hybrids, offering substantial screening and canopy size.

Height: Typically reaches 8–12 feet (2.4–3.6 meters) tall.
Spread: Achieves a broad 6–10 feet (1.8–3 meters) spread, establishing a dense, rounded form.
Its rapid growth rate makes it excellent for quickly filling large spaces or establishing a privacy screen.

USDA Hardiness Zone

This high-performance hybrid is reliably hardy in USDA Hardiness Zones 9–11. It thrives in hot, arid, and Mediterranean climates, tolerates light frost, but must be protected from prolonged or severe freezes. It is an excellent choice for coastal gardens due to its hardiness.

Cultivation and Care

Aspect	Care Instructions
Sunlight	Demands full sun (a minimum of 6 hours of direct sun daily) to ensure dense growth and maximum, year-round flower production.
Soil	Essential: Requires perfectly well-drained soil. Tolerates poor, sandy, or gravelly soils but will rapidly fail in wet feet or heavy, compacted clay.
Water	Highly drought-tolerant once established. Water deeply during the first year to build a strong root system. Mature plants require minimal supplemental water, making it ideal for water-wise landscaping.
Fertilizer	Crucial: You must AVOID all high-phosphorus fertilizers. Grevilleas are extremely phosphorus-sensitive. Use only a specialized low-phosphorus formula for Australian natives or skip fertilizing entirely.
Pruning	Benefits from hard pruning after the main winter/spring bloom to maintain its shape, control size, and encourage denser, fresh foliage growth.

Landscape Use

Privacy Screen/Hedge: Its dense, tall, and fast-growing habit makes it a perfect large hedge or visual screen.
Specimen Tree: Ideal for use as a focal point in the landscape due to its striking ruby-red flowers and architectural structure.
Slopes and Banks: Excellent for erosion control on dry slopes and difficult-to-maintain areas.
Xeriscape Design: A reliable, low-water, low-maintenance addition to native and arid gardens.

Wildlife Attraction

The abundance of sweet, rich nectar makes this plant a top choice for attracting nectar-feeding birds, including hummingbirds and native honeyeaters. The extended bloom season provides a crucial, consistent food source, supporting wildlife diversity in your garden.

Pest and Disease Resistance

Grevillea 'Kings Celebration' is a hardy, robust plant with high natural resistance to most common insect pests. The primary disease concern is fungal root rot, which is a direct consequence of poor soil drainage or overwatering—this is easily prevented by correct planting in well-drained, sandy soil.

Propagation

To preserve the unique, desirable qualities and exceptional bloom of this specific cultivar, propagation must be achieved through vegetative methods. Semi-hardwood cuttings are the preferred and most reliable technique, typically taken during the summer months.¹ Propagation from seed is not recommended as the resulting plant will not be true to the parent hybrid.

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Grevillea 'Kings Celebration': A Royal Display of Color Blooms