Urban gardens are small, hot and overlooked, and the plants that suit them are chosen for shape as much as looks. This guide covers what a courtyard, side passage or balcony needs in Australian cities: height without width, the right aspect, pots that do not cook, and the rules worth checking first.
What urban Australian gardens actually need
Australian blocks have shrunk substantially over the past few decades while houses have grown, so the typical urban garden is now a narrow side passage, a courtyard, a small backyard and a balcony. The constraints follow from that.
| Constraint | What it rules out |
|---|---|
| Small footprint | Anything with a wide mature canopy |
| Two-storey neighbours | Low screening; you need height in a narrow form |
| Radiated heat from walls and paving | Soft-leaved and moisture-loving plants |
| Services under narrow beds | Vigorous-rooted trees - figs especially |
| Limited time | Anything needing weekly attention |
Height without width
The defining urban problem. These give screening in a narrow footprint:
- Straight and Narrow lilly pilly - five to six metres tall, holds about a metre wide.
- Eumundi quandong - eight to twelve metres, only three to four wide, for subtropical gardens.
- Capital ornamental pear - ten metres tall, two to three wide, deciduous.
- Clumping bamboo - six to seven metres in barely a metre of ground.
- Teddy Bear magnolia - four metres, dense to the ground, minimal pruning.
Aspect decides everything in a small space
With little room, you cannot move a plant to a better spot - so get it right first. Remember the aspects invert here: north is sunniest, south is shadiest, west takes brutal afternoon sun and stored heat, and east is the gentlest.
A west-facing urban courtyard in Perth or Adelaide is genuinely hostile - the wall radiates stored heat after sunset, so plants never get a cool recovery period. Plant agave, olive, dragon tree and succulents there, not ferns.
Go vertical, and use pots properly
Floor space is the scarce resource. Star jasmine on galvanised wires covers a wall in two to three years and can be removed later without damaging render - unlike climbing fig, which attaches directly and takes the surface with it.
For pots, go bigger than feels necessary. A 200 mm pot against a hot wall dries out completely between morning and evening in an Australian summer. Use 400 to 500 mm minimum, choose pale colours in sun since dark pots cook roots, and group them so they shade each other.
Check what is underground
Urban blocks are dense with services, and narrow beds usually sit over something. Call Before You Dig, and keep vigorous-rooted species - figs above all - well away from slabs, driveways and sewer lines. A Ficus hillii in a planter box is excellent; the same plant in a narrow bed beside a driveway is a repair bill.
Rules worth checking
- Tree protection. Most Australian councils protect trees above a certain size, and removal without a permit carries fines.
- Nature strips are council land in most of Australia, with height and species rules - though many councils now actively encourage verge planting.
- Body corporate rules for balconies and courtyards, particularly on pot weight and anything fixed to walls.
- Pool barriers - planting inside the non-climbable zone can affect compliance.
By city
- Sydney - the smallest blocks and the most two-storey infill. Narrow screening is the priority.
- Melbourne - terrace and townhouse courtyards; frost pockets form in enclosed spaces on clear nights.
- Brisbane - heat plus humidity in an enclosed space. Airflow matters as much as shade.
- Perth and Adelaide - reflected heat off render plus alkaline sandy soil. Olive, agave and dietes are reliable.
- Canberra and Hobart - a walled space holds warmth and often grows what the open garden cannot.
Related guides
Urban gardening is mostly a question of scale. Our guide to gardening in small spaces covers the layout side of the problem that plant lists cannot solve.
On a balcony, wind and reflected heat matter more than soil. Our balcony plant picks cover the varieties that survive that exposure, and the plants for balconies range is filtered to them.
Peace lilies suit a shaded balcony or a bright room, and they droop to tell you when they need water.
Succulents earn their place in a city garden because they forgive a fortnight away. Our guide to the world of succulents covers the families worth collecting, and you can browse the succulents range to start one.
If your courtyard can carry a tree, one is worth more than a dozen pots. The small trees for urban gardens range covers the varieties that stay under about four metres.
Indoors, the snake plant copes with low light and missed waterings, and there are more in our indoor plants range. On a sunny balcony, lavender handles heat and wind in a pot.
Ready to plant?
Choose for the light and the water you can realistically give, not for the photograph. Our guide to low-maintenance plants that practically take care of themselves is the shortlist, and the plants for small gardens collection is where to buy them.
