Grevillea banksii: Iconic Red Silky Oak with Dramatic Crimson Flower Brushes
1-gallon (6x6x12” - 18”)
$55.00
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$55.00
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Grevillea banksii
Grevillea banksii: Iconic Red Silky Oak with Dramatic Crimson Flower Brushes
$55.00
Prix promotionnel
$55.00
Prix régulier
Grevillea banksii
Classic Red Flowering Grevillea Species
Grevillea banksii, commonly known as the Red Silky Oak or Red Flowering Grevillea, is a classic and botanically significant Grevillea species native to eastern Australia. This evergreen shrub is admired for its bold toothbrush‑style blooms, typically produced in rich red tones (with occasional cream forms), and its deeply divided, silky‑textured foliage. The flowers create strong movement and contrast, offering a timeless, natural look that anchors many modern Grevillea hybrids.
Well suited to both ornamental planting and habitat‑focused landscapes, Grevillea banksii thrives in full sun with excellent drainage and open airflow. Its vigorous growth, drought tolerance, and wildlife value make it a foundational species for Mediterranean, coastal, and water‑wise gardens. Once established, it requires minimal maintenance and performs reliably across warm‑climate regions.
Botanical Characteristics of Grevillea banksii
| Characteristic | Detail |
|---|---|
| Scientific Name | Grevillea banksii |
| Common Name | Red Flowering Grevillea, Red Silky Oak |
| Growth Habit | Large, upright to spreading evergreen shrub |
| Foliage | Deeply divided, silky green leaves with silvery undersides |
| Flowers | Toothbrush‑style blooms, most commonly deep red |
| Flowering Season | Extended bloom period; often fall through spring |
| Special Features | Species parent of many hybrids, strong wildlife attraction, drought tolerant |
Mature Size and Form
• Height: 8–15 ft
• Spread: 6–12 ft
Grevillea banksii forms a bold, naturalistic shrub with arching branches and an open structure. It can be left to develop freely or selectively pruned after flowering to shape or reduce size. For pruning techniques and long‑term care tips, refer to our Protea & Grevillea Care Guide.
USDA Hardiness Zones
Zones 9–11
Best performance occurs in regions with mild winters, bright sun exposure, and well‑drained soils. Avoid poorly drained sites or prolonged cold and humidity.
Cultivation and Care for Grevillea banksii
| Aspect | Care Instructions |
|---|---|
| Sunlight | Full sun for strongest growth and flowering |
| Soil | Well‑drained, sandy or loamy soil; slightly acidic preferred |
| Water | Low once established; deep, infrequent watering |
| Fertilizer | Low‑phosphorus or native‑plant fertilizer only |
| Pruning | Prune after flowering; avoid cutting into old woody growth |
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 banksii
• Foundational species shrub with bold red floral display
• Ideal for Mediterranean, coastal, and water‑wise landscapes
• Excellent for screening, wildlife corridors, and large garden spaces
• Strong attraction for birds and pollinators
• A key species within curated Grevillea collections
Wildlife Attraction
The nectar‑rich flowers are highly attractive to birds, hummingbirds, bees, and other pollinating insects, making this species a vital contributor to garden biodiversity.
Pest and Disease Considerations
Grevillea banksii is generally resilient when grown in suitable conditions. Potential issues include:
• Root rot in poorly drained or overwatered soils
• Nutrient stress caused by phosphorus‑heavy fertilizers
• Minor frost damage in colder microclimates
Full sun, excellent drainage, and low‑phosphorus nutrition are essential for long‑term plant health.