Grevillea robusta
TAXONOMY
FamilyProteaceae
GenusGrevillea
Zone9
LEARN MORE
Plants of the World OnlineABOUT
Grevillea robusta, commonly known as the Silk Oak, is a fast-growing evergreen tree native to eastern coastal Australia. It belongs to the family Proteaceae and the genus Grevillea. This tree is known for its fern-like leaves and bright yellow-orange flowers. It thrives in subtropical climates and can grow up to 30 meters tall. It is often used as an ornamental tree in gardens and parks.
ALSO KNOWN AS
Australian Silky-Oak
Silkoak
Silky Oak
Stylurus Robustus
Grevillea robusta var. forsteri
Grevillea umbratica
Grevillea venusta
OVERVIEW
VPDCalculate
WaterDry
SoilLoamy
LightDirect Bright (6 Hours)
Temperature25° C
Humidity60%
pH6
Pressure1,013 mbar
DETAILS
Care Instructions
Grevillea robusta requires bright, direct sunlight for optimal growth. It prefers moderate temperatures and high humidity. Water the plant when the soil is almost completely dry, but avoid waterlogging. This tree is relatively easy to care for but requires regular pruning to maintain its shape and health.Soil
The Silk Oak prefers well-draining loamy soil. It can tolerate a range of soil types but thrives best in slightly acidic to neutral pH levels. Ensure the soil has good drainage to prevent root rot.Fertilizer
Use a balanced fertilizer with an N-P-K ratio of 10-10-10. Fertilize the plant during the growing season, typically in spring and summer, to promote healthy growth.Repotting
Repot young trees every 2-3 years to accommodate their growing root system. Choose a pot that is slightly larger than the current one and ensure it has good drainage. Repotting is best done in the spring.Propagation
Grevillea robusta can be propagated from seeds or cuttings. Seeds should be sown in a well-draining seed mix and kept moist until germination. Cuttings should be taken from semi-hardwood growth and rooted in a suitable medium.Pruning
Prune the tree regularly to remove dead or damaged branches and to maintain its shape. Pruning is best done in late winter or early spring before new growth begins.Toxicity
Grevillea robusta is toxic to pets and humans. The leaves and flowers contain compounds that can cause skin irritation and allergic reactions. Ingestion can lead to more severe symptoms, so it is important to handle the plant with care.Additional
Grevillea robusta is also known for its timber, which is used in furniture making and cabinetry. The tree attracts birds and insects with its vibrant flowers, making it a valuable addition to wildlife gardens.REVOLUTIONIZE YOUR PLANT CARE
Make Every Plant Smart
Plant Monitor
STAYS IN YOUR PLANT
Accurately measures the core metrics of your plant – soil moisture, light, temperature and humidity - as well as compound metrics such as Vapor Pressure Deficit (VPD) and Growing Degree Days (GDD).
Shop Now
