Grevillea robusta - silky oak
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Tall fast-growing ornamental native grevillea tree, impressive and unmistakable in full flower in spring, when it seems to glow. Elegant slender conical silhouette with sweeping upturned branches and deep green tiny leaves. Often flowers at the same time as jacaranda and poinciana, creating an orange-purple-red rainbow of colour in street scenes. If you're looking for brown silky oak you want Grevillea baileyana, and for white silky oak Grevillea banksii alba.
Grevillea robusta - silky oakAPPEARANCE : Tall fast-growing ornamental native tree with a slender conical silhouette. Deep golden flowers spring-summer, large deep green ferny leaves all year round.
ORIGIN : Native to QLD and NSW rainforests
USE FOR : Plant as a tall shade tree or feature tree. Attracts wildlife. Timber useful for fine woodworking; flowers for honey production.
CLIMATE: Will thrive across much of Australia - street plantings and specimens in the National Arboretum show that it can survive a Canberra winter.
PLANTING: Plant in well drained soil in full sun to part shade. Can be grown as a foliage pot plant when young. Their root systems can be problematic so avoid planting too near foundations
CARE: Maintenance free once established. Mulch and water regularly until the plant is established, usually 12 weeks. Feed with a slow release native fertiliser when buds form - grevilleas can be phosphorus-sensitive so the P ratio of the fertiliser needs to be under 3%. Drought tolerant and frost hardy once it has developed a woody trunk.
HEIGHT: 10-15m in gardens. Can grow to 30m in the rainforest.
YOUR PLANTS: These are tubestock plants, healthy young plants with new roots that will establish quickly in your garden. The pot size is 80 mm x 42 mm wide.
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