shrub

Sylvia grevillea

The Story

Plant Bio

Grevillea is a diverse genus of evergreen Australian woody plants characterised by their distinctive, petal-less flowers where long, colourful styles emerge from a looped tube to form brush-like or spider-like inflorescences. These plants are highly adapted to nutrient-poor soils, relying on specialised cluster roots to absorb phosphorus and other minerals efficiently.

'Sylvia' is a robust, fast-growing hybrid cultivar that produces dense, cylindrical racemes of deep rosy-pink to red flowers with yellow-tipped styles throughout the year. The deeply divided, fern-like foliage is deep green to silvery-green, with new growth and winter leaves displaying a distinct bronze sheen.

Uses & Benefits:

Produces large, deep rosy-pink to red flower brushes year-round against deeply divided, silvery-green foliage with bronze new growth.

Functions as an effective fast-growing privacy screen, windbreak, or feature shrub that tolerates moderate drought once established.

Provides a continuous, high-value nectar source for native bees, butterflies, and nectar-feeding birds like honeyeaters and lorikeets.

Essentials

At a Glance

Plant Type

Shrub

Height

142 inches

Width

142 inches

Light

Full Sun, Partial Sun

Zones

9, 10

Water

Low to moderate

Humidity

Moderate

Lifespan

Evergreen shrub

Native To

Australia (garden origin)

Toxicity

Skin irritant

Planting

How to Grow

Select a site in full sun to partial shade with sandy loam, loam, or clay loam soil that drains freely.
Dig a planting hole twice the width of the root ball but of equal depth, ensuring the surrounding soil is unimproved.
Gently remove the plant from its container, inspect the roots for circling, and place it in the hole so the soil level matches the pot.
Backfill with the native soil, firm down gently, and water in thoroughly to settle the root system without adding compost or standard fertiliser.

Pro Tip

Plant directly into unimproved, well-draining soil without adding organic compost, and avoid standard fertilisers; excess phosphorus is highly toxic and rapidly kills the root system.

Keep It Thriving

Care Guide

Do

Prune lightly and regularly from an early age to maintain a dense, bushy habit.
Use only low-phosphorus or native-specific organic fertilisers sparingly.
Ensure the soil remains highly free-draining to prevent root rot.

Don't

Do not apply standard commercial fertilisers containing more than two percent phosphorus.
Do not enrich the planting hole with heavy organic compost.
Do not cut back heavily into old, leafless wood where dormant buds cannot shoot.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Fertilize
Mulch
Pest Check
Propagate
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Screening and informal hedgingFeature or specimen shrubWildlife and habitat gardens to attract nectar-feeding birds

Companion Plants

Grevillea banksii Grevillea sessilis

Multiply

Propagation Methods

Good to Know

Common Questions

Sylvia grevillea questions

What zones can Sylvia grevillea grow in?

Sylvia grevillea is hardy in USDA Zones 9–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

When does Sylvia grevillea bloom?

Sylvia grevillea typically blooms in year round through year round. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Sylvia grevillea need full sun?

Sylvia grevillea does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Sylvia grevillea drought tolerant?

Yes — once established (usually after the first full season), Sylvia grevillea handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.