If you’re looking to create a lush, green privacy screen or an ornamental hedge, chances are you’ve come across Syzygium australe, commonly known as Lilly Pilly.
Native to Australia and widely appreciated for its glossy leaves and bright new growth, this hardy plant is a favorite among gardeners and landscapers alike.
But if you’re planning your garden design around it, one critical question comes to mind: How fast does Syzygium australe grow?
Growth Rate of Syzygium Australe
Syzygium australe is considered a fast-growing plant under the right conditions.
On average, it can grow between 30 to 60 centimeters (12 to 24 inches) per year, although some vigorous cultivars may achieve even more rapid growth.
In ideal conditions, a well-maintained Syzygium australe hedge can reach:
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2 to 3 meters tall (6.5 to 10 feet) in about 3 to 5 years.
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With pruning, it can be kept to a smaller, dense hedge of around 1.5 meters in height.
Factors That Influence Growth Speed
While Syzygium australe is a naturally quick grower, several factors can influence its actual growth rate:
1. Climate
This species thrives in warm, temperate to subtropical climates. In colder regions or areas with heavy frost, growth may slow down significantly.
2. Soil Conditions
Well-drained, fertile soil is key. If the soil is too compacted or waterlogged, growth will be slower. Adding organic matter can boost both soil quality and plant health.
3. Sunlight
Syzygium australe prefers full sun to partial shade. For maximum growth, plant it where it receives at least 5–6 hours of sunlight a day.
4. Watering
Young plants need regular watering to establish strong roots. Once established, the plant is drought-tolerant, but consistent moisture will promote faster and healthier growth.
5. Pruning
Regular pruning encourages denser foliage and can stimulate new growth. For hedging purposes, prune lightly and often during the growing season.
6. Fertilization
Using a balanced, slow-release fertilizer in spring and summer can significantly increase the growth rate. Organic compost or a seaweed-based tonic also helps support vigorous development.
Popular Varieties and Their Growth Habits
There are several cultivars of Syzygium australe that vary in growth rate and size:
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‘Resilience’ – Known for its hardiness and disease resistance; fast growing.
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‘Bush Christmas’ – Compact and ideal for low hedges; moderately fast growth.
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‘Select Form’ – Taller, upright variety, excellent for screening; fast growth.
Tips for Faster Growth
To get the most out of your Syzygium australe hedge or ornamental planting:
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Plant in spring or early autumn to take advantage of warm soil.
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Space plants adequately (around 1 meter apart) to allow room for lateral growth.
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Apply mulch to retain moisture and suppress weeds.
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Monitor for psyllids and other pests, which can slow growth if left untreated.
Final Thoughts
So, how fast does Syzygium australe grow? Under optimal conditions, quite fast—making it a top pick for anyone looking to establish a green barrier or fill space quickly in the garden.
With proper care, feeding, and maintenance, your Syzygium australe hedge will thrive, offering privacy, beauty, and year-round interest.