Fast-Growing Screening Plants for Privacy in South West WA
Privacy is a common concern on new-build blocks. Homes are often positioned close together; fences can feel exposed, and outdoor entertaining areas may be visible from neighbouring properties.
Plants can soften these boundaries and create a more private garden, but the available planting space is often limited. A screening plant that naturally grows into a large tree or broad shrub may look suitable when it is young but eventually become difficult to contain.
For compact new-build gardens, we generally prefer plants that provide useful screening while remaining relatively narrow and manageable.
Start With the Height You Actually Need
Before choosing a screening plant, consider what you are trying to conceal.
You may want to:
Soften a Colorbond fence
Screen a neighbouring window
Add privacy around a patio or fire pit
Reduce the view into the backyard
Separate the lawn from an entertaining area
Hide utilities or an unattractive section of the property
Not every situation requires a three-metre hedge. A dense plant reaching approximately 1.5 metres may provide enough privacy around a seated area, while a taller plant may be needed between facing windows.
The width of the garden bed is just as important as the desired height. A plant that naturally grows two or three metres wide will not remain comfortable in a narrow strip without regular pruning.
Callistemon Slim
Callistemon viminalis ‘CV01’ Slim PBR
Among the Callistemon varieties we commonly have access to, Callistemon Slim is one of the most practical screening choices for a compact new-build block.
It has been selected for its naturally narrow growth habit and generally reaches approximately 3 metres high by 1.3 metres wide. This makes it considerably easier to accommodate beside a fence or along a narrow boundary than many traditional bottlebrush varieties.
Callistemon Slim may work well for:
Screening between neighbouring windows
Narrow garden beds along a fence
Creating privacy around a patio
Adding height behind lower garden plants
Softening a long boundary
Creating a flowering native screen
It produces red bottlebrush flowers and can attract birds and pollinating insects. It can be left with a more natural appearance or pruned to encourage a denser, more uniform screen.
Although it is described as narrow, it still needs adequate space to develop. It should not be squeezed into an extremely small strip where its mature width will obstruct a path or press heavily against a fence.
Naringa Westringia
Westringia ‘Naringa’
Naringa Westringia is a useful option where a medium-height screen is enough.
It develops dense foliage and can be used to soften a fence, screen a sitting area or separate different sections of a small garden. It has a more restrained, mature size than many traditional screening shrubs and responds well to occasional pruning.
Naringa is particularly useful where homeowners want:
A native hedge
Privacy around seated areas
A screen near fence height
Dense foliage without planting a tree
A plant suited to coastal or exposed conditions
It will not provide the same height as Callistemon Slim, but it may be more suitable where the garden bed is positioned beneath windows or where a taller screen would make the backyard feel enclosed.
Blue Gem Westringia
Westringia ‘Blue Gem’
Blue Gem is a smaller Westringia that generally works best as a low screen rather than a full-height privacy hedge.
Its dense foliage can still provide valuable separation around:
Fire pit areas
Courtyards
Front gardens
Low windows
Turf edges
Outdoor seating areas
It is also useful as the middle layer of a mixed screen, with taller plants positioned only where additional privacy is needed.
This can prevent a compact garden from feeling surrounded by one continuous wall of tall foliage.
Pencil Perfect Woolly Bush
Adenanthos sericeus ‘Pencil Perfect’
Pencil Perfect is a narrow form of woolly bush with soft, fine foliage and an upright appearance.
It can be a good choice where the goal is to break up a view rather than create a tightly clipped hedge. Its narrow form makes it easier to position in compact gardens than the broader standard woolly bush.
It may suit:
Narrow front garden beds
Planting beside windows
Coastal-style gardens
Repeated planting along a boundary
Creating a softer, less formal screen
Pencil Perfect usually creates a lighter and more open appearance than Callistemon Slim or Westringia. It is therefore better for softening a boundary than for creating complete visual separation.
Compact Banksias
Compact Banksia varieties can provide lower screening while adding flowers, structure and food for local wildlife.
They may be useful:
Beneath windows
Along a front boundary
Between taller screening plants
In wildlife-friendly native gardens
Where a screen of around one to 1.5 metres is sufficient
The exact mature dimensions vary considerably between Banksia cultivars, so the chosen plant should be checked carefully before it is included in a narrow new-build garden.
A compact Banksia will not provide full-height privacy, but it can form part of a layered screen without taking up as much room as a large shrub or tree.
Star Jasmine on a Trellis
Trachelospermum jasminoides
Where there is very little ground space available, a climber can be more practical than a row of shrubs.
Star jasmine can be trained over a suitable trellis to create a green screen while using only a narrow planting strip.
It may be suitable for:
Side boundaries
Courtyards
Narrow beds beside patios
Screening Colorbond fencing
Areas where a broad shrub would obstruct access
Star jasmine needs a suitably strong support and some ongoing training and trimming. It should be kept clear of gutters, gates, vents and neighbouring structures.
It is particularly useful when the available garden bed is too narrow to comfortably accommodate the mature width of Callistemon Slim.
Combine Plants Instead of Creating One Large Hedge
A screen does not need to consist of one plant variety repeated along the entire boundary.
On a compact new-build block, it can be more effective to position taller plants only where privacy is required.
For example, a planting design could include:
Callistemon Slim between neighbouring windows
Naringa Westringia around a patio
Blue Gem Westringia near a fire pit area
Compact Banksias beneath windows
Lomandra or Dianella along the front
Groundcovers between larger plants
This creates layers of foliage while keeping the garden visually interesting.
It can also reduce maintenance because every section of the boundary does not need to be maintained as a tall hedge.
How Far Apart Should Screening Plants Be?
Screening plants are sometimes installed very close together to create privacy quickly. While this may close the initial gaps sooner, it can cause problems as the plants mature.
Overcrowded plants may:
Compete for water
Grow unevenly
Extend over paths
Press against fences
Require constant pruning
Develop bare sections
Become difficult to maintain
Spacing should be based on the expected mature width of the selected plant rather than how small it appears in the nursery pot.
For Callistemon Slim, the planting layout should allow for its approximately 1.3-metre mature width. Exact spacing may be adjusted depending on whether the goal is a continuous hedge or a more informal row of individual shrubs.
How Quickly Will Screening Plants Grow?
The establishment rate will depend on:
The plant variety
Starting pot size
Soil preparation
Irrigation
Sun exposure
Wind
Drainage
Planting season
Ongoing care
Buying larger plants can provide more immediate height, but it does not replace good soil preparation.
A smaller plant installed into properly prepared soil with consistent watering may establish more successfully than a larger plant placed directly into compacted builder’s sand.
Fast-growing also does not mean instant. Even vigorous plants need time to establish their roots and fill the spaces between them.
Prepare the Soil Before Planting
Many new-build properties are left with compacted builder’s sand, construction rubble or soil with very little organic matter.
Before installing a screening row, the site may require:
Construction waste removed
Compacted ground loosened
Suitable soil added or incorporated
Organic matter
Wetting agent
Reticulation
Mulch
Screening plants are expected to establish evenly and grow into one connected planting. Poor soil preparation can result in some plants thriving while others remain small or struggle.
Install Reticulation Before Planting
Screening plants require consistent watering while becoming established.
Dripline is often a practical option for a narrow boundary garden because it can run through the planting area beneath the mulch. This helps deliver water along the row without spraying fences, windows or paths.
Reticulation is generally easier to install before plants, mulch, turf and footpaths are completed.
The watering schedule should then be adjusted as the plants establish and seasonal conditions change.
Which Screening Plant Should You Choose?
As a general guide:
For taller privacy in a relatively narrow bed:
Callistemon Slim
For a medium-height native hedge:
Naringa Westringia
For privacy around a seated area:
Blue Gem Westringia
For a soft, upright screen:
Pencil Perfect woolly bush
For a low wildlife-friendly screen:
A compact Banksia
For an extremely narrow planting strip:
Star jasmine on a trellis
The final selection should be based on the available width, required height, soil, sunlight and the level of maintenance the homeowner is comfortable with.
Screening Plants for South West New Builds
Karri Coast Landscaping can help select screening plants suited to the space available and the amount of privacy required.
We consider each plant’s mature height and width before developing the planting layout. We can also complete the soil preparation, reticulation, planting, mulching and steel edging as part of a new-build landscaping project.
Choosing compact and naturally narrow plants from the beginning can create privacy without leaving homeowners with an overcrowded garden that requires constant pruning.
