The 12 best Australian native plants for Canberra gardens
Canberra sits on Ngunnawal and Ngambri Country. The city's climate is unlike any other Australian capital: a genuine cool-temperate continental climate with hot, dry summers and cold winters. Ground frosts can occur from April through to October and summer temperatures can swing by 30 degrees in a single day. Frost is a seasonal reality that defines which plants survive.
The plants below are drawn from the ACT's indigenous flora and from the wider cool-temperate and alpine zone of south-eastern Australia. Several are indigenous to the ACT itself. All handle Canberra's frost, its summer heat and the heavy clay soils that underlie much of the city's suburban belt.
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Understanding Canberra's soils and climate
Canberra's soils and climate present a set of challenges that are genuinely distinct from every other Australian capital city.
Heavy clay — inner suburbs, valley floors and frost hollows
Much of Canberra's suburban belt sits on heavy clay derived from granite and basalt, with a pH that ranges from slightly acidic to neutral. These soils compact badly, drain poorly in winter and bake hard through summer. The valley floors and low-lying areas where cold air pools on still nights present the most challenging combination of waterlogged winter soil and severe frost. Before planting, work gypsum through the top 30cm with a cultivator to improve structure and mulch deeply in autumn before the ground cools.
Sandy loam — elevated positions and north-facing slopes
Better-drained sandy loam soils occur on elevated positions and north-facing slopes across the ACT. These soils suit a wider range of native plants, drain well enough for Proteaceae species and warm more quickly in spring. A slim trowel is often sufficient for planting into these lighter soils. A terracotta olla buried beside new plantings through the first summer makes a significant difference to establishment on these fast-draining sites.
The frost rule
Ground frosts can reach -10°C in exposed positions on still winter nights and even sheltered suburban gardens regularly see -5°C or below. Every plant on this list handles genuine, repeated, hard frost. Before buying any native plant for a Canberra garden, verify its frost tolerance against ACT conditions.
12 native plants that genuinely perform in Canberra
Silver wattle (Acacia dealbata)
Silver wattle is Canberra's winter tree. It is indigenous to the greater Canberra region, entirely frost-hardy and its flowering coincides precisely with the period when nectar is most scarce for honeyeaters and other birds. The fine, silver-grey foliage is attractive year-round and provides soft, dappled shade in summer.
John Tann from Sydney, Australia, CC BY 2.0, via Wikimedia Commons
Like all wattles it is short-lived but grows quickly and self-seeds readily, meaning a replacement is often already in the garden before the original declines. Prune by no more than one-third after flowering with sharp secateurs. Note that outside its natural range in warmer coastal areas it can become invasive.
Woolly grevillea (Grevillea lanigera)
Woolly grevillea is the most reliable frost-tolerant grevillea for Canberra gardens. The red and cream toothbrush flowers appear from mid-winter through spring and are visited by eastern spinebills and New Holland honeyeaters through the coldest months. It handles Canberra's clay-loam, hard frosts and summer heat.
Plant on a slight mound in heavy clay as it will not tolerate permanently wet soil. Like all grevilleas it is highly sensitive to phosphorus. Prune by up to one-third after the main flowering flush with sharp secateurs. For more on frost-tolerant native plants, see our guide.
Austral indigo (Indigofera australis)
Austral indigo is one of the most underused native shrubs for Canberra gardens. In spring it covers itself in long sprays of vivid pink-purple pea flowers that are among the most intense colours in the ACT's indigenous flora. It is indigenous to the greater Canberra region, completely frost-hardy and nitrogen-fixing, improving the soil around it as it grows.
It handles Canberra's clay soils, frost and summer drought. Prune lightly with sharp secateurs after flowering to keep it bushy. It can be short-lived in poorly drained clay so plant on a slight mound and replace as needed.
Common correa (Correa reflexa)
Common correa is the most reliable winter-flowering native shrub available to Canberra gardeners. The tubular red and green flowers appear from April through winter and carry one of the most significant nectar loads of any plant in the ACT. It handles Canberra's combination of wet clay winters and dry summers without complaint.
It prefers a sheltered position in its first winter while establishing and benefits from light tip pruning with sharp secateurs after flowering to encourage dense growth. For more on correa's value for attracting birds, see our guide to attracting birds in winter.
Planting in Canberra
Autumn is the best planting window for Canberra native gardens. Soil temperatures are still warm enough to encourage root establishment before winter sets in and plants have the cool, moist months ahead to build root systems before their first dry summer. See our maintenance guide by climate zone.
Kangaroo grass (Themeda triandra)
Kangaroo grass was the ecological foundation of Canberra's original grasslands. It is the species that once covered the basalt and granite plains of the ACT in vast sweeps, shifting from green in spring through to deep copper-red in summer. Almost all of those original grasslands have been destroyed and what remains is critically endangered. Growing kangaroo grass in a Canberra garden is a small act of ecological restoration.
It handles Canberra's clay, hard frost, summer drought and poor soils and provides seed for native finches through autumn and winter. Cut back by half in late winter with hedging shears before new growth begins. Plant in drifts of five or more. For more on native grasses, see our guide.
Showy everlasting (Chrysocephalum apiculatum)
Showy everlasting fills the summer flowering gap that most other plants on this list leave open. The bright golden-yellow button flowers appear in spring and continue almost continuously through summer and into autumn. It is indigenous to the ACT region, completely frost-hardy and drought-tolerant once established, with silvery-grey foliage that looks attractive between flowering flushes.
It requires good drainage and will not tolerate waterlogged clay so plant on a slight mound or in a raised bed in heavy soil positions. Cut back by one-third after each main flowering flush with sharp secateurs to keep it compact and productive. It works well as a groundcover between larger shrubs, planted in drifts alongside kangaroo grass and brachyscome at the garden's front edge.
Silver banksia (Banksia marginata)
Silver banksia is the most cold-hardy and climate-adaptable banksia in Australia and the right choice for Canberra. It has populations growing from sea level to alpine zones in Victoria and the ACT ranges, giving it genuine tolerance of the frosts and temperature extremes that defeat other banksia species. The pale yellow cylindrical flower spikes appear from late summer through winter, providing nectar to honeyeaters.
It requires well-drained, slightly acidic to neutral soil. Plant on a slight mound in heavy clay. Never fertilise with phosphorus. For more information, see our banksia growing guide.
Burgan (Kunzea ambigua)
Burgan is one of the most ecologically significant shrubs of the ACT's dry sclerophyll woodland. In midsummer it covers itself in masses of small white flowers that are intensively worked by native bees and other pollinators. It is a pioneer species meaning it is one of the first woody plants to colonise disturbed ground and burnt areas.
It responds well to pruning with hedging shears after flowering to maintain a compact, dense form and can be used as an informal hedge or screen. It is fast-growing, requires no fertiliser and is genuinely self-sufficient once established.
Hardenbergia (Hardenbergia violacea)
Hardenbergia fills a critical gap in the Canberra garden — it flowers through late winter and early spring when almost nothing else is producing colour. The vivid purple pea flowers are a significant nectar source for eastern spinebills and honeyeaters at the time of year when those resources are most scarce. It is indigenous to the ACT region and one of the few truly reliable climbers for cool-climate gardens.
It twines through existing shrubs, climbs fences with light wire support, or sprawls as a groundcover in open positions. Prune lightly with sharp secateurs after flowering. For more on native climbers for fences and structures, see our guide.
Poa tussock (Poa labillardieri)
Poa tussock is the great structural grass of Canberra's cooler, moister garden positions. The blue-green foliage is attractive year-round and the feathery flower heads in spring add a soft, airy texture. Unlike kangaroo grass, poa tussock handles part shade and moister clay without issue.
Divide congested clumps every four to five years in autumn using a hand fork or garden knife to keep plants vigorous. Cut back by one-third in late winter before new growth begins. For more on native grasses, see our native grasses guide.
Mulching in Canberra
Mulch performs two distinct jobs in Canberra that are less critical elsewhere: it moderates soil temperature against summer heat and insulates root zones against winter frost. Apply 10cm of coarse wood chip in autumn before the ground cools and replenish it each year. Keep mulch clear of plant crowns as in Canberra's cold, wet winters, mulch pressed against stems can promote fungal collar rot.
Cut-leaved daisy (Brachyscome multifida)
Brachyscome is the most reliable groundcover available for Canberra gardens. It produces small pink, mauve, white or lilac daisy flowers almost continuously through most of the year, including through winter in sheltered positions and handles Canberra's clay, frost and summer drought with a toughness that belies its delicate appearance.
Cut back by half with hedging shears in late winter to remove spent growth and encourage a fresh spring flush. Divide with a hand fork in autumn to extend the planting without buying additional plants.
Ovens wattle (Acacia pravissima)
Ovens wattle is the cascading wattle. It is indigenous to the greater Canberra region and the ranges of the southern tablelands, entirely frost-hardy and its late-winter flowering overlaps with hardenbergia to create a sustained period of colour from July through September that carries the garden through its most difficult months.
Donald Hobern from Copenhagen, Denmark, CC BY 2.0, via Wikimedia Commons
It requires good drainage and does not tolerate permanently waterlogged clay so plant on a slight mound in heavy soil positions. Prune by up to one-third immediately after flowering with sharp secateurs to maintain the weeping form. Like all wattles it is short-lived but replacements from self-seeding are common in suitable positions.
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Putting it together
A Canberra native garden built from these twelve plants has something happening in every month of the year, including the depths of winter. Silver wattle, Ovens wattle and hardenbergia carry the late-winter flowering season from July through September. Woolly grevillea and correa provide nectar from autumn through winter. Austral indigo and burgan take over in spring. Silver banksia fills the critical autumn-to-winter nectar gap. Kangaroo grass and poa tussock provide year-round structural interest. Brachyscome and showy everlasting cover the ground with near-continuous flower from spring through summer and into autumn.
Deep watering beats frequent watering through Canberra's summer dry spells. A terracotta olla buried beside each new plant through its first two summers builds the deep root habit that sees established plants through summer without supplementary irrigation. Mulch generously in autumn and replenish each year — in Canberra it performs the dual function of moderating summer heat and insulating against winter frost.
The result is a garden drawn from the ACT's own indigenous flora reflecting the landscape of Ngunnawal and Ngambri Country, supporting the honeyeaters and finches that belong here and growing more self-sufficient with each year it settles into the cold Canberra soil beneath it.
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