Botanical Name: Grevillea robusta
Common Name: Silk Oak Type of Plant: dicot: tree Character evergreen Habit of Growth: Overall Shape an erect, tall, loosely columnar to pyramidal tree; older trees become broad and very picturesque, develop a rough, fissured, gray-brown bark Height 30-60' (100') Spread 1/3 to 1/2 Growth Rate rapid Environment: Exposure outdoors full sun; thrives in desert heat Soil prefers deep, well-drained soils; tolerates poorer Hardiness young trees: some frost; mature trees: hardy zones 8-9, 12-24 Morphology: Leaves 2-pinnatifid; alternate, lobes lanceolate and entire or secondarily lobed; blades are silky beneath; leaves 6-12" long Flowers orange, in flattened racemes, 2-4" long, along the branch (older wood); petals are lacking; numerous stamens; May-July (April) Fruit a follicle:1/2-3/4" long, dark brown withwinged seeds Propagation: seed Usage: a fast-growing vertical accent; suitable for groves, large-scale landscapes, erosion control; messy; brittle branches; leaf drop, not suitable for small landscapes – best for informal or drought-tolerant plantings Landscape Care: Watering an occasional deep soak; grows poorly in heavy irrigated areas; becomes very drought-tolerant after established Fertilizing little required except if overwatered; check for chlorosis Pruning stake and develop primary framework when young; thin out Pests/Diseases root rot is a problem in warm wet soils Special Conditions/Other Origin: Australia Family: Proteaceae Notes: |
Your pictures go here |