Also known as Australian Silky-Oak · Silk-Bark Oak · Silkoak
Silk Oak (Grevillea robusta) is an Australian native evergreen tree known for its striking golden-orange flowers and fern-like foliage. It's a fast-growing tree that attr
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun
100% intensity
Prefers full sun for best growth and flowering. Can tolerate partial shade but may become leggy.
Moderate to Low
50% intensity
Allow soil to dry slightly between waterings, especially for established plants. Ensure good drainage.
Well-drained
50% intensity
Moderate to Warm
75% intensity
Thrives in warm climates. Can tolerate light frost but is sensitive to prolonged freezing temperatures.
Low
25% intensity
Benefits from balanced fertilizer during the growing season, but is not a heavy feeder.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | No |
Non-toxic
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water young Silk Oaks regularly to establish a strong root system. Once mature, they are quite drought-tolerant. Allow the soil to dry out slightly between waterings.
Overwatering can lead to root rot, so ensure good drainage. Reduce watering in cooler months.
Prune Silk Oaks to shape them, remove dead or crossing branches, and control size. The best time for significant pruning is after flowering.
For established trees, light pruning can be done anytime to maintain the desired form. Remove any suckers that appear from the base.
Silk Oaks can be propagated from seeds sown in spring or from cuttings taken in late spring or summer. Seeds may require stratification.
Cuttings should be treated with rooting hormone and placed in a well-draining medium. Success rates can vary depending on conditions.
Repot young Silk Oaks every 1-2 years, or when root-bound. Choose a pot only slightly larger than the current one. Use a well-draining potting mix. Repotting is best done in spring.
Mature trees in the ground generally do not require repotting and prefer to be left undisturbed.
Identify plants like this with ePlant AI
Snap a photo to get care tips and match similar species on the go.
Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Silk Oak (Grevillea robusta)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Proteales |
| Family | Proteaceae |
| Genus | Grevillea |
| Species | Grevillea robusta |
Similar in genus Grevillea
Answers based on plant encyclopedia data
