Indigenous, exotics, invasives, ornamentals: What's the difference?
Understanding basic plant categories is half the battle when you’re growing a garden. These groupings explain how plants behave, which makes it easier to choose species that align with what you want your garden to do.
For many gardeners, that goal is increased wildlife. For others, it is lower water use, heat survival, or less input.
The categories below show generally how different plant choices influence these outcomes, including the trade-offs that come with each approach.
1. Indigenous plants (local natives)
Indigenous plants are native to your specific local area. They have adapted perfectly to your local soils, rainfall patterns, temperature extremes and fire cycles. In landscapes that have been heavily fragmented, gardens planted with indigenous species act as critical stepping stones between remnant habitats.
Their role in your garden
Many insects have close relationships with local plants that cannot occur elsewhere. When those insects thrive, birds and other wildlife follow. This is the most direct way your garden having some indigenous plantings can provide food and shelter.
Benefits of indigenous plants
- Best support for local insects, pollinators and birds.
- Adapted to your local soils and rainfall patterns.
- Usually lower water and input needs once established.
- Stronger sense of place: your garden belongs where it is.
How to find indigenous plants for your area
Good sources include:
- Your local council planting guides (usually available online)
- Landcare or Bushcare groups
- Indigenous plant nurseries
- Regional botanical gardens
- Local revegetation lists
A few Indigenous plant examples by state and territory
(Examples only. Indigenous plant lists vary by region within each state.)
New South Wales
- Kangaroo grass (Themeda triandra)
- Sydney red gum (Angophora costata)
- Native violet (Viola hederacea)
Victoria
- Common tussock grass (Poa labillardierei)
- Chocolate lily (Arthropodium strictum)
- Hop goodenia (Goodenia ovata)
Queensland
- Lomandra (Lomandra longifolia)
- Blue flax lily (Dianella caerulea)
- Native hibiscus (Hibiscus heterophyllus)
South Australia
- Coastal daisy-bush (Olearia axillaris)
- Saltbush (Atriplex species)
- Pigface (Carpobrotus species)
Western Australia
- Red and green kangaroo paw (Anigozanthos manglesii)
- Swan River daisy (Brachyscome iberidifolia)
- Red Flowering Gum (Corymbia ficifolia)
Tasmania
- Native iris (Diplarrena moraea)
- Silver banksia (Banksia marginata)
- Native cranberry (Astroloma humifusum)
Australian Capital Territory
- Kangaroo grass (Themeda triandra)
- Snow gum (Eucalyptus pauciflora)
- Yam daisy (Microseris walteri)
Northern Territory
- Spinifex (Triodia species)
- Native hibiscus (Hibiscus arnhemensis)
- Billygoat plum (Terminalia ferdinandiana)
2. Native plants (Australia-wide)
Native plants occupy a critical middle ground in Australian gardening. They are ecologically meaningful, so a common entry point for gardeners looking to move beyond ornamentals. Where indigenous plants can be harder to source, native species offer a practical way to increase biodiversity and resilience.
Their role in your garden
- Offer a range of forms, colours and textures.
- Better tolerance of heat, drought and variable rainfall.
- Reliable nectar, seed and shelter for wildlife.
- Lower long-term input than many exotics once established.
- Widely available and easy to integrate into existing gardens.
The ecological trade-off
Native does not automatically mean right for every location. Soil type, drainage, frost, humidity and exposure still matter. Wildlife benefits are also not as highly targeted compared with indigenous plants.
Tools for Australian Gardeners
3. Perennial plants
A plant is considered perennial if it can live for multiple years, returning from the same root system. If it's long-lived, forming clumps or establishing over time, it is almost certainly a perennial.
Their role in your garden
Perennials provide continuity for soil life, insects and birds by contributing to:
- Long-term habitat and structure.
- More consistent food sources across seasons.
- Lower replanting needs and less disruption.
- Stability for soil and improved structure and porosity.
- Fairly reliable recovery after heat, drought or flooding.
The ecological trade-off
Some long-lived perennials can become dominant if not managed. Dense plantings may shade out smaller species or reduce the disturbance some ecosystems rely on. It's best to mix perennials with shorter-lived plants for balance.
Examples of perennials
- Lomandra
- Kangaroo paw (Anigozanthos)
- Rosemary
- Lavender
4. Annual plants
Annuals complete their entire life cycle in one growing season, from seed to flower to seed and then finish. They prioritise rapid growth and fast flowering which makes them effective at delivering colour in a short window.
Their role in your garden
Australians' biggest driver for buying plants is adding colour to their home garden. This explain why annuals remain popular even as our interest in biodiversity grows. Annuals offer:
- Immediate impact.
- Options for filling gaps and seasonal displays.
- An opportunity to learn (they teach you quickly what works in your microclimate).
- A cost effective option for one-off, large plantings.
The ecological trade-off
Because they complete their life cycle in a season, annuals provide brief windows of nectar, pollen and shelter. Gardens dominated by annuals require frequent replanting, increasing soil disturbance and long-term costs.
Examples of annuals
- Cosmos
- Zinnia
- Everlasting daisy (Rhodanthe chlorocephala and related Rhodanthe species)
- Australian cornflower (Rhodanthe manglesii)
5. Ornamental plants
Ornamentals can be exotic or native, annual or perennial, but are grown for appearance. Early colonial gardens in Australia were modelled on European ideals, designed as styled spaces that didn't feel part of the surrounding landscape. Ornamentals continue to provide that visual cohesion.
Their role in your garden
Ornamentals persist because they shape how a garden looks and feels. They offer:
- Strong visual impact.
- Contrast and structure.
- Seasonal highlights.
- Familiarity and emotional connection.
The ecological trade-off
Many ornamentals have limited nectar or flower forms that are inaccessible to local insects. When ornamentals dominate, gardens may appear lush while supporting very little life, contributing to what is often described as a dead zone.
Some native plants are classified as ornamentals and retain real wildlife value.
Examples of ornamental plants
- Box hedge
- Japanese maple
- Hybrid roses
6. Exotic plants
Exotic plants originate outside Australia. They are familiar, culturally meaningful and widely available, which explains their continued popularity.
Role in the garden
Exotics remain common because they:
- Offer a wide variety of shapes, colours and seasonal effects.
- Formed the foundation of traditional gardens long before native plants were widely promoted.
- Are tied to childhood gardens, family homes and public landscapes.
- Have been bred for predictable growth and extended flowering.
The ecological trade-off
There is a strong link between home gardening choices and weed pressure in bushland. Around 70 percent of introduced plant species started as garden plants. While some exotics grow well, many require higher water, fertiliser or maintenance to persist in conditions they did not evolve for.
Examples
- Hydrangeas
- Camellias
- Rhododendrons
7. Invasive plants
Invasive plants spread aggressively, displace other species, reduce biodiversity and create long-term management problems. Invasive plant control and losses are estimated at nearly A$5 billion per year across Australia.
Responsible plant choice is not only about protecting wildlife but also about reducing the economic burden of species that spread beyond where they belong.
Common examples (vary by region)
- Agapanthus
- Privet
- Madeira vine
- Pampas grass
How these plant types compare at a glance
General guide only. Individual species vary.
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Indigenous Wildlife benefit: Very high Water needs: Low Long-term value: Very high Input: Low Invasive risk: None |
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Native Wildlife benefit: Medium–high Water needs: Low Long-term value: Medium–high Input: Low–medium Invasive risk: Low |
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Perennial Wildlife benefit: Medium Water needs: Medium Long-term value: High Input: Low–medium Invasive risk: Low |
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Annual Wildlife benefit: Low–medium Water needs: Low–medium Long-term value: Low Input: Medium–high Invasive risk: Low |
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Ornamental Wildlife benefit: Low–medium Water needs: Variable Long-term value: Variable Input: Medium Invasive risk: Medium |
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Exotic Wildlife benefit: Low Water needs: Variable Long-term value: Low Input: Medium–high Invasive risk: Medium |
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Invasive Wildlife benefit: None Water needs: None Long-term value: None Input: Very high Invasive risk: Very high |
A simple takeaway
Most gardens are a mix of these categories and that’s normal. But, increasing the share of native plants moves a garden toward resilience and wildlife support. Choosing some indigenous plants is where that impact becomes most concentrated.
If you do just one thing, keep what you love, but let your next plant additions pull the garden a little closer to home.
