How to turn a lawn into a no-dig Australian wildlife garden
A lawn is one of the least productive areas a garden can have. It supports little insect life, provides no food or shelter for birds or small mammals, requires maintenance and does not improve the soil beneath it. It is known as an ecological dead zone.
Converting even a small patch of your lawn to a planted native garden changes all that. This no-dig method means you can do it without experience, breaking your back or needing heavy machinery. It does not involve removing any turf and it can be as big or as small as you like.
It is the single most effective and easy approach to lawn conversion available.
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Two ways to tackle your no-dig garden
The basic principle is the same either way: lay cardboard directly over your lawn in any shape you wish, cover it with organic matter and plant into it. Where the two approaches differ is what goes on top of the cardboard and when you plant. Both work well. This is also a great activity to do with children.
| Option 1: Cardboard and mulch, then wait | Option 2: Cardboard, soil and mulch, plant now | |
|---|---|---|
| How it works | Lay cardboard directly on the lawn, cover with a deep layer of woodchip mulch, then wait 6–8 weeks. The lawn dies, the cardboard breaks down and you plant into the improved soil beneath | Lay cardboard on the lawn, add a layer of good soil on top of the cardboard (minimum 15cm), then cover with woodchip mulch. Plant immediately into the soil layer above the cardboard. The cardboard breaks down the lawn simultaneously from below while stopping weeds |
| Pros | Lawn is thoroughly suppressed before plants go in. Soil biology is more active by planting time. Lower risk of grass competing with new plants. Lower upfront cost | No waiting. Plants go in when you are ready. The lawn is being suppressed below while plants establish above — two processes happening at once |
| Cons | Requires planning ahead. You may miss the ideal planting window if timing does not align. A slower process to see visible change | Higher upfront cost — you need enough soil to give root balls a minimum 15cm of growing medium above the cardboard. Requires a little more vigilance for any grass pushing through at the edges in the early weeks |
| Best for | Laying the bed in time to be ready for the appropriate planting season of your climate zone | When you want to get plants in the ground now and are prepared to monitor the bed through the first season |
When to start
The best time to start is now. You can lay a no-dig bed at any time of year and in most Australian climate zones the plants will establish if you follow the right approach for your season. That said, autumn is the single best window in most parts of the country as the organic matter has the entire cool, wet season to break down and the conditions are ideal for plant establishment.
Here is the ideal timing by climate zone:
Temperate and cool temperate
Victoria · Tasmania · ACT · Southern NSW · Adelaide Hills
Lay the bed in late summer or early autumn — March to April. If using Option 1, this gives the bed the full winter to break down before spring planting. If using Option 2, plant straight into the bed in autumn and take advantage of the best establishment window of the year.
Subtropical
South-east Queensland · Coastal NSW north of Sydney
Lay and plant as the humidity rises and before the main rainfall arrives — February to April. The wet season does the irrigation work for you through early establishment.
Tropical
Darwin · Cairns · The Kimberley
Lay the bed at the end of the wet season when soil is still moist — April to June. The dry season that follows allows gradual establishment without waterlogging.
Mediterranean
Perth · Coastal South Australia
Autumn is again ideal — March to May. Winter rains take over the irrigation burden almost immediately and the dry summer that follows is still months away, giving plants time to establish roots before they need to draw on them. See our Perth native plants guide for species suited to this climate.
What you will need
The materials are simple and many are free or very low cost.
- Cardboard. Collect boxes from supermarkets, hardware stores or appliance retailers — the larger and thicker the better. Remove all tape and staples before laying. You need enough to cover the entire area in a double layer, overlapping joins by at least 20cm to prevent grass creeping through.
- Organic matter. Aged woodchip mulch is the best option — coarse, not fine, and well-aged rather than fresh. For Option 1 you need a minimum 15cm depth of mulch. For Option 2 you need a minimum 15cm of good quality garden soil on top of the cardboard, plus a mulch layer over that. Do not buy in bags; contact your local landscape supplier and have it delivered by the cubic metre. See our guide to feeding native plants for why lean soil suits most Australian natives better than rich compost.
Tools you will need
- Gardening belt — keeps your tools within reach across a large area
- Rake — for clearing clippings before laying and distributing mulch evenly
- Broom — useful for smoothing cardboard flat as you lay it
- Digging fork — for loosening compacted edges around the bed perimeter
- Hori-hori — your primary planting tool, particularly for tube stock
- Weeder — for any grass that pushes through at the edges in the early weeks
- Gloves — keep them on throughout, especially when handling organic matter
The no-dig method, step by step
What about buffalo and couch grass?
Couch grass and kikuyu are the most persistent lawns to smother. Both spread by above-ground runners that can push through gaps in the cardboard and reestablish in the mulch layer. A double layer of cardboard with generous overlaps handles most of it, but vigilance at the edges in the first season is essential. Buffalo is generally easier to suppress. A neglected weedy lawn with a mix of broadleaf weeds and annual grasses is the easiest of all.
What happens beneath the surface
The no-dig method does something that conventional lawn removal cannot: it builds the soil as it kills the grass. As the cardboard breaks down it feeds worms and soil bacteria. As the organic matter above decomposes it adds carbon and improves soil structure. The lawn's own root system decomposes in place, adding organic matter at depth. Whether you wait or plant straight away, the process beneath the cardboard is the same.
This is exactly what native groundcovers and living mulch plants need to establish well. The loose, carbon-rich surface layer is easy for roots to colonise, retains moisture efficiently and supports the soil fungal networks that many native plants depend on.
A lawn converted by digging loses this as the act of turning the soil destroys the structure and biology that the no-dig method preserves.
What to plant
The converted bed will support almost any Australian native plant that suits your climate zone and aspect. For maximum wildlife value, aim for a layered planting including a mix of groundcovers, mid-shrubs and at least one taller structural plant. Your city planting guides for Melbourne, Sydney, Brisbane, Perth, Adelaide, Hobart, Darwin and Canberra are a good starting point.
Tube stock is the right choice for a new bed as the small root ball establishes readily in the loose mulch layer and is significantly more cost-effective than advanced plants. See our budget guide for how to plant a large area for less.
What wildlife will visit a native garden vs. a lawn
A lawn supports almost no animal life beyond the occasional introduced species. The surface is too uniform, the structure too simple and the food value too low. A native garden, even a small one, operates on an entirely different ecological level.
Native bees are typically the first to arrive, often within days of the first flowers opening. Australia has over 1,700 species of native bee, most of them solitary and ground-nesting. The blue banded bee, one of the most important native pollinators, nests in soft soil and forages across a surprisingly small territory, meaning a single garden bed can support an entire breeding population.
Honeyeaters, wrens, thornbills and silvereyes follow quickly where flowering natives provide nectar and denser planting provides cover. Small birds are particularly dependent on low, dense shrubs for safe movement between foraging areas. Seed-eating birds including finches are drawn to native grasses as they go to seed through summer and autumn. Reptiles, including skinks and blue-tongued lizards, use the warm edges of mulched beds for basking and the cool interior for shelter. Insects of all kinds colonise the leaf litter and mulch layer, creating the base of a food web that sustains everything above it.
The process is self-reinforcing: more insects attract more insectivorous birds, which keep pest populations in balance, which keeps the garden healthier without any intervention. None of this happens on a lawn, but all of it can happen on a converted bed within a single season.
What the garden becomes
A patch of lawn converted to native planting does not stay a patch for long. Within two to three seasons, the groundcovers spread, the shrubs fill the mid-layer and the structural plants begin to give the space height and volume. The soil continues to improve as plant roots penetrate deeper and the organic matter layer is replenished naturally from above.
What was a high-maintenance monoculture becomes a low-maintenance, self-sustaining system. The lawn needed mowing, fertilising and watering to stay green. The native garden needs almost nothing once established and in return it gives back far more than a lawn ever could.
keep reading
A Guide to Australian Native Gardening
How to plan, plant and care for a thriving native garden, whatever your experience level.
Read the guide →
