shrub

Shiress's Grevillea

The Story

Plant Bio

Grevillea shiressii, commonly known as Shiress's Grevillea, is an open, erect to sprawling evergreen shrub native to a highly restricted sandstone creek region north of Sydney, Australia. It features long, lanceolate leaves with distinctive wavy margins and produces unusual saccate flowers that transition from green to translucent cream, offset by prominent red-brown to mauve styles.

Unlike many members of its genus that demand intense baking sun, this species adapts remarkably well to protected, partially shaded positions. The older, larger stems develop a highly textured, deeply fissured grey-to-black bark that provides structural interest beneath the soft, undulating foliage.

Uses & Benefits:

Offers unique, translucent green-and-cream flowers set against deeply textured, dark fissured bark and wavy, lanceolate leaves.

Serves as an effective, shade-tolerant screening or understory shrub in mild, frost-free coastal climates.

Provides a rich source of nectar for hummingbirds in North American gardens during the winter and spring months.

Essentials

At a Glance

Plant Type

Shrub

Height

196"

Width

157"

Light

Full Sun, Partial Sun

Zones

9, 10

Water

Medium

Humidity

Moderate

Lifespan

Moderate

Native To

Australia

Toxicity

Mild Skin Irritant

Bloom period

Winter – Spring

In flower about 6 months of the year

Planting

How to Grow

Select a planting site with excellent drainage, such as a raised bed, sandy slope, or mound of decomposed sandstone.
Incorporate coarse sand or gravel into the planting hole to ensure water never pools around the root crown.
Position the plant in full sun to partial shade, ensuring protection from cold, drying winter winds.
Water deeply but infrequently during the first summer to establish a deep root system, then reduce watering.

Pro Tip

Never prune back into old, leafless wood, as this species lacks the epicormic buds required to regenerate from bare branches.

Keep It Thriving

Care Guide

Do

Use exclusively low-phosphorus or native-formulated slow-release fertilizers to avoid phosphate toxicity.
Plant in highly permeable, acidic sandy loam or alluvial soil mixes.
Provide light, regular tip-pruning immediately after the spring flowering flush to maintain a bushy habit.

Don't

Do not apply standard garden fertilizers, composts, or manures containing high phosphorus levels.
Do not plant in heavy clay or low-lying areas prone to standing water.
Do not cut back into old, bare wood when pruning.

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Specimen PlantingUnderstory ShrubBird GardenScreening

Companion Plants

Banksia spinulosa Anigozanthos flavidus Adenanthos sericeus

Multiply

Propagation Methods

Good to Know

Common Questions

Shiress's Grevillea questions

What zones can Shiress's Grevillea grow in?

Shiress's 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.

Is Shiress's Grevillea deer resistant?

Not reliably. Deer may browse Shiress's Grevillea, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Shiress's Grevillea bloom?

Shiress's Grevillea typically blooms in winter through spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Shiress's Grevillea need full sun?

Shiress's Grevillea does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.