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A Guide to Different Grevillea Varieties That Thrive in American Gardens

Saul Goodman
2025-09-29 04:45:40

Greetings, fellow sun-worshippers and nectar-lovers. We are the Grevilleas, a diverse clan from the ancient landscapes of Australia. While our origins are far away, we have found welcoming homes in many American gardens, particularly in the sun-drenched, well-drained soils of California and the Southwest. We offer you not just stunning, intricate flowers that are a magnet for your hummingbirds and bees, but also resilient, evergreen foliage that provides year-round structure. For those of you seeking water-wise and wildlife-friendly plants, we are an excellent choice. Let us introduce you to some of our most garden-worthy members.

1. Grevillea 'Robyn Gordon'

I am perhaps the most celebrated of the cultivated grevilleas, and for good reason. I am a compact, sprawling shrub, typically staying under 6 feet tall and wide, making me perfect for borders or as a feature plant. My main attraction is my prolific blooming habit; I produce my stunning, coral-pink and rose-red spider-like flowers in cycles throughout the entire year, with no distinct off-season. My dense, deeply divided foliage is an attractive deep green. I am remarkably adaptable, tolerating a range of soils as long as they are well-drained, and I am highly resistant to drought once my roots are established. Please ensure I have excellent drainage, as my roots are sensitive to waterlogged conditions.

2. Grevillea rosmarinifolia (Rosemary Grevillea)

If you seek a more formal, tidy appearance, look to my variety. I am an upright, dense shrub, growing to about 6 feet tall and wide, with needle-like foliage that bears a striking resemblance to the rosemary herb. This fine-textured, aromatic foliage provides a beautiful backdrop for the clusters of spidery flowers that appear primarily in spring and sporadically at other times. The blooms are typically a vibrant red, though some cultivars offer pink hues. I am exceptionally hardy, tolerating temperatures down to around 15°F, and I thrive in full sun with little water. I am ideal for hedges, screening, or as a structural element in a dry garden.

3. Grevillea 'Long John'

For those who desire a grander specimen, I am the one. I am a large, open, and airy shrub that can reach heights and spreads of 10-12 feet or more. My charm lies in my spectacular, 6-inch long clusters of coral-pink flowers, which are a breathtaking sight from late winter through spring. My foliage is fine and fern-like, creating a soft, graceful appearance. I am a fast-grower and make an excellent privacy screen or a dramatic background plant. Like my cousins, I demand full sun and perfect drainage. Give me plenty of space to show off my elegant, weeping form.

4. Grevillea lanigera 'Coastal Gem'

For the smaller spaces, rockeries, or cascading over walls, I am your perfect candidate. I am a low-growing, prostrate shrub, forming a dense mat that rarely exceeds 1-2 feet in height but can spread several feet wide. My small, gray-green leaves are soft to the touch, and I produce small but charming clusters of pink and cream flowers off and on throughout the year. I am incredibly tough, handling coastal winds, light frosts, and severe drought with ease. I am also one of the most tolerant grevilleas of occasional poor drainage. Plant me as a groundcover that will suppress weeds and add constant texture and color.

5. Grevillea victoriae (Royal Grevillea)

I bring a touch of rugged, mountain hardiness to the collection. Native to the alpine regions of Australia, I am a large, rounded shrub that can grow to 8-10 feet. My oval leaves are a handsome gray-green on top with a soft, silvery-white underside, creating a lovely two-toned effect in the breeze. My flower clusters are a brilliant fiery orange-red, and they are a vital food source for hummingbirds during the cooler months when I bloom. I am one of the most cold-tolerant grevilleas, capable of withstanding temperatures down to 10-15°F, making me a great choice for gardeners in cooler parts of USDA zones 8 and 9.

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