Silky oak - Grevillea robusta (Care, Characteristics, Flower, Images)

Silky oak

Also known as: Silver oak, Southern silky oak

Because of its prolific blossoming, which can blanket the tree canopy and provide abundant shade, the southern silky oak is a good tree for parks. Its resplendent flowers attract bees, butterflies, and birds. Prior to the invention of aluminum, its wood, which is resistant to wood rot, was frequently used for external window joinery.

Scientific classification

Species

Silky oak (Grevillea robusta)

Proteas, lotuses, planes, and allies

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Toxic to Humans

Toxicity

Perennial

Lifespan

Tree

Plant Type

Spring, Summer

Bloom Time

Spring, Summer, Fall, Early winter, Mid winter

Harvest Time

5 m to 40 m

Plant Height

8 m to 9 m

Spread

Green

Leaf Color

Non-dormant

Dormancy

Evergreen

Leaf type

20 - 38 ℃

Ideal Temperature

Images of Silky oak

Distribution of Silky oak

Distribution Map

The silky oak is only native to Queensland and New South Wales, Australia, but it has been introduced to North and South America, Africa, and India with a preference for subtropical habitats. Although it has been introduced to North America, it is considered invasive in California. It is often used as an ornamental shade tree and as a houseplant.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Temperate rainforests

Hemisphere Trend Curve

Northern

Sorthern

Flowering

Fruiting

Culture

Garden Use

Silky oak is an elegant evergreen tree that, depending on the climate, can be grown outdoors, indoors, or as an annual. This tree is desirable for its vibrant orange flowers and fern-like foliage, which truly make it stand out in the yard or house. You can grow silky oak as a specimen piece, in Mediterranean or xeriscape gardens, or as a houseplant in a sunny spot. Silky oak enjoys the company of yellow buttons, daisies, and acacias.

Symbolism

Protection, Health, Money

Interesting Facts

Although the felling of silky oak is now restricted due to its population decline, it was once used for furniture and building. The wood is resistant to rotting, so it was used for items such as windows, furniture, and fences. Silky oak has also been used to make the backs and sides of guitars.

Name Story

Silky oak: The common name reflects the silky texture of freshly split wood and the prominent ray cells. The specific epithet robusta is a latin word meaning "strong like oak" or "robust". Although it is not closely related to the true oaks (Quercus), it is still commonly called silky oak.

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Toxicity

Contact with silky oak can cause severe toxic reactions in humans, requiring urgent attention. Touching its sap, bark, flowers, or leaves can irritate the eyes and skin, leading to dermatitis, blistering, and itching. Children are at risk due to the plant's presence in household gardens or as a houseplant.

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Care Guide for Silky oak

Every 1-2 weeks

Water

Full sun

Sunlight

20 - 38 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Silky oak thrives in well-drained soils with moderate hydration, suitable for temperate climates. Watering should occur every 1-2 weeks, allowing the soil to partially dry. As an evergreen, it needs consistent moisture to support year-round foliage growth while adapting to natural precipitation variations.

Fertilize: To support robust growth, fertilize silky oak quarterly with high nitrogen fertilizers, adjusting for seasonal needs. Use slow-release formulas and water before application to avoid root burn. Wear gloves to ensure safety and prevent over-fertilization, enhancing vigor for growth cycles.

Pruning: Silky oak features fern-like leaves and yellow flowers. Prune from early to late winter by removing damaged branches to enhance air circulation and shape. Light pruning promotes dense growth and controls size, but avoid heavy pruning to prevent stress, ensuring healthy blooms and vitality.

Propagation: Silky oak is an evergreen tree from Australia, propagated through semi-hardwood cuttings treated with rooting hormone. A warm, humid environment with balanced moisture and a well-draining potting mix will promote rooting, leading to the establishment of healthy new plants with proper care.

Repotting: Repot silky oak every 2-3 years in spring to support its growth. Choose a spacious container for the deep roots, and provide partial shade and well-draining soil afterward. Ensure the pot promotes root growth to maintain silky oak's health and vibrant foliage.

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Images of Silky oak

Distribution of Silky oak

Culture

Toxicity

Care Guide for Silky oak

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