If you’ve ever stared at a bare fence line and wished for a fast, graceful screen that doesn’t look like a block of green concrete, the Weeping Lilly Pilly might already be on your shortlist. This Australian native combines a soft, weeping form with seriously fast growth — up to a metre a year under the right conditions — making it one of the most popular choices for privacy in a hurry. We’ll walk through its size, roots, care needs, and the trade-offs you should know before planting.
Botanical Name: Waterhousia floribunda (syn. Syzygium floribundum) · Mature Height: 10–15 m (33–49 ft) · Growth Rate: Fast (up to 1 m per year) · Flowering Season: Spring to summer · Fruit: Edible purple berries · Native Range: Eastern Australia
Quick snapshot
- Reaches 10–15 m in the wild, 6–10 m in cultivation (Wikipedia)
- Grows up to 1 m per year in ideal conditions (The Plant Company (New Zealand nursery))
- Produces cream flowers in spring/summer and edible purple berries (Love The Garden (horticultural guide))
- Prefers full sun to part shade and tolerates light frost (Wikipedia)
- Precise root invasiveness not formally studied; anecdotal reports suggest fibrous, non-aggressive roots (Screen Hedge Plants (hedging specialist))
- Psyllid susceptibility varies by region and is not universally confirmed (Love The Garden)
- Lifespan under typical garden conditions not formally recorded (Screen Hedge Plants (hedging specialist))
- Reaches full height in 10–15 years under optimal conditions (The Plant Company)
- A 30 cm sapling typically grows 50–60 cm per year (The Plant Company)
- If planting as a hedge, expect 3–4 years to reach target height from a 300 mm plant (Bunnings Workshop (community advice))
- Regular tip‑pruning from young age encourages dense branching (Ozbreed (plant breeding nursery))
A compact overview of the tree’s core characteristics.
| Attribute | Detail |
|---|---|
| Botanical name | Waterhousia floribunda (syn. Syzygium floribundum) |
| Family | Myrtaceae |
| Native region | Eastern Australia |
| Mature height | 10–15 m (33–49 ft) |
| Mature spread | 5–8 m (16–26 ft) |
| Growth rate | Up to 1 m per year |
| Flowering | Spring to summer, cream-coloured clusters |
| Fruit | Edible purple berries |
| Sun exposure | Full sun to part shade |
| Frost tolerance | Light frosts |
How big does a weeping Lilly Pilly grow?
What is the mature height of Weeping Lilly Pilly?
In its natural habitat along the east coast of Australia, Waterhousia floribunda can reach 10–15 m. In garden cultivation, most specimens top out between 6–10 m (Wikipedia (botanical database)). That’s taller than a typical two‑storey house, so it’s essential to allow headroom unless you plan to keep it clipped as a hedge.
What is its spread?
At full maturity the canopy spreads 5–8 m. A nursery video from YouTube (gardening channel) advises leaving at least 5 m of clearance if you want a tree form. For a hedge, you can prune to contain width — but the natural shape is broad and weeping.
How fast does it grow per year?
Under ideal soil and moisture conditions, a young Weeping Lilly Pilly can put on up to 1 m of height each year (The Plant Company (New Zealand nursery)). The first year is slower: a 30 cm tube‑stock plant may only add 30 cm, then accelerate to 50–60 cm annually once established. That’s as fast as many eucalypts, making it one of the quickest native screens available.
“Tip‑pruning from a young age is recommended to encourage thick, bushy side branching rather than tall, sparse growth.”
Love The Garden (horticultural guide)
A tree that grows a metre a year sounds ideal — until you realise a neglected specimen can outgrow its space in five years. The implication: regular pruning isn’t optional; it’s the difference between a graceful screen and a management problem.
The implication: if you want a manageable shape, plan for consistent trimming from the start.
Are weeping Lilly Pilly roots invasive?
What type of root system does Weeping Lilly Pilly have?
Unlike some eucalypts with aggressive, spreading roots, Waterhousia floribunda develops a fibrous, non‑taproot system. Screen Hedge Plants (hedging specialist) notes that anecdotal evidence suggests the roots are not aggressive, though no formal studies exist. The catch: “non‑invasive” doesn’t mean zero risk — any tree planted too close to foundations or drains can still cause issues.
Compared to other Lilly Pilly species
Compare with Syzygium australe (Brush Cherry) or Acmena smithii (Lilly Pilly), both also fibrous‑rooted. Among the three, Weeping Lilly Pilly is the fastest grower, meaning its root system expands more quickly. Still, it’s considered safe for planting near paved areas if you give it at least 2–3 m of clearance. The trade‑off: you gain peace of mind about footings but lose the option of a tight, narrow planting strip.
Roots that aren’t invasive still need oxygen. Compacted clay or waterlogged soil can lead to root rot — a far bigger killer than structural damage.
The pattern: root safety comes with site‑selection demands that many gardeners overlook.
Where is the best place to plant a weeping lilly pilly?
Sunlight requirements
Full sun delivers the densest foliage and fastest growth. Weeping Lilly Pilly also performs well in part shade, though the canopy may become more open. Six hours of direct sun per day is the sweet spot for a thick screen.
Soil preferences
It thrives in well‑drained, moisture‑retentive soil. Ozbreed (plant breeding nursery) recommends mulching with organic matter to improve soil structure. Heavy clay that stays wet is problematic — the number one cause of failure is waterlogged roots.
Climate tolerance
The tree handles light frosts, coastal salt spray, and humid subtropics. It’s widely planted from Brisbane to Melbourne and across New Zealand. Severe frosts (below −5 °C) can damage young foliage, so inland gardeners with hard winters should site it in a sheltered spot (Love The Garden).
What are the negatives of lilly pilly?
Common problems with Lilly Pilly plants
The most notorious issue is the Lilly Pilly psyllid (Trioza eugeniae), a tiny sap‑sucking insect that causes pimpled leaves and sooty mould. Not all varieties are equally affected — Waterhousia floribunda shows moderate resistance, but in some regions attack can be severe (Love The Garden). Other negatives include fruit drop (the purple berries stain paving and attract flies) and top‑heaviness in exposed windy spots.
Specific concerns for Weeping Lilly Pilly
- Fruit mess: Edible berries are a draw for birds but can create a slippery mess on decks and paths.
- Wind risk: The weeping canopy catches more wind, increasing the chance of limb breakage — stake young trees in open sites.
- Size management: If planted as a hedge, it needs pruning two or three times a year to stay tidy. Neglect it and you’ll face a thicket of leggy growth.
“Weeping Lilly Pilly is an Australian native with a slightly drooping habit, often used as a hedge/screen as it responds well to pruning.”
The Tutu Guru (garden design blog)
How quickly does a weeping Lilly Pilly grow?
Annual growth rate
Research from The Plant Company confirms that a well‑cared‑for plant in good soil can achieve 1 m of height each year. Slower rates — 30–50 cm — are typical in poor soil, deep shade, or drought conditions. This makes it one of Australia’s fastest‑growing native evergreens, roughly on par with Acacia melanoxylon (Blackwood) but with a neater habit.
Comparison to other fast-growing trees
A YouTube nursery guide (watch here) notes that the annual increase in width is about 30–40 cm, so a hedge planted 1 m apart can close in two years. Compare that to slower hedging species like Buxus (10–15 cm/year) or Viburnum (20–30 cm/year), and the Weeping Lilly Pilly’s appeal for instant screening becomes clear.
The pattern: speed comes with a maintenance price tag. Fast growers demand more water, more nutrients, and more pruning to stay in shape.
Specifications at a glance
Ten essential specs, one clear picture: Weeping Lilly Pilly is a large, fast‑growing evergreen that behaves best when given room and regular care.
| Specification | Value |
|---|---|
| Botanical name | Waterhousia floribunda (syn. Syzygium floribundum) |
| Family | Myrtaceae |
| Plant type | Evergreen tree |
| Mature height (wild) | 10–15 m |
| Mature height (cultivation) | 6–10 m |
| Mature spread | 5–8 m |
| Growth rate (annual) | Up to 1 m |
| Flowering season | Spring to summer |
| Fruit type | Purple berry (edible) |
| Sun requirement | Full sun to part shade |
| Frost tolerance | Light frosts (−2 °C) when established |
| Soil preference | Moist, well‑drained, organic‑rich |
What this means: you’re committing to a large, vigorous tree that demands a strategic planting site.
Pros and cons
Upsides
- Very fast growth (up to 1 m/year)
- Attractive weeping habit adds softness to landscapes
- Fibrous roots unlikely to damage foundations
- Edible berries support bird life
- Responds well to pruning; can be kept as hedge or tree
- Tolerates coastal conditions and light frost
Downsides
- Susceptible to psyllid attack (varies by region)
- Fruit drop creates mess near paved areas
- Can become top‑heavy in windy spots
- Needs regular pruning (2–3 times/year) as hedge
- Large mature size unsuitable for small gardens
- Waterlogged soil leads to root rot quickly
Confirmed facts and what remains unclear
Confirmed facts
- Weeping Lilly Pilly is a fast‑growing evergreen tree reaching 10–15 m in the wild (Wikipedia).
- It produces cream flowers in spring/summer and edible purple berries (Wikipedia).
- It grows well in full sun to part shade and tolerates light frost (Wikipedia).
- It is widely planted as an ornamental in Australia and New Zealand.
- Tip‑pruning from a young age encourages dense branching (Love The Garden).
What remains unclear
- Precise root invasiveness is not well‑documented; anecdotal reports suggest fibrous roots are not aggressive.
- The specific susceptibility to psyllid pests varies by region and is not universally confirmed.
- Lifespan under typical garden conditions is not formally recorded.
- The exact growth rate under water‑restricted conditions is not formally studied, only observed.
- The long‑term survival rate in urban environments is not systematically tracked.
The pattern: many practical details rely on gardener experience rather than formal research.
What the experts say
“Weeping Lilly Pilly produces clusters of small, cream‑colored flowers during spring and summer. These flowers are followed by edible purple berries.”
Kilby Tree Farm (specialist nursery)
“It will grow in full sun to part shade and has and will tolerate light frosts.”
Wikipedia (Syzygium floribundum)
workshop.bunnings.com.au, reddit.com, sunshinecoastplants.com.au, instagram.com
For a detailed look at pruning and seasonal maintenance, refer to this comprehensive weeping lilly pilly care guide for the species.
Frequently asked questions
Does Weeping Lilly Pilly need full sun?
It performs best in full sun (6+ hours/day) but will grow in part shade. Density of foliage decreases in shadier spots (Wikipedia).
Can Weeping Lilly Pilly be grown in a pot?
Yes, but it will not reach full size. Choose a large pot (at least 60 L) and prune roots and canopy regularly. Dwarf varieties are better for containers.
How often should I water a Weeping Lilly Pilly?
Newly planted: twice a week for the first year. Once established, reduce to once a week, adjusting for rainfall (Nursery Near Me (care guide)).
What fertilizer is best for Weeping Lilly Pilly?
A balanced slow‑release native fertiliser (e.g., 7‑3‑10 NPK) applied in early spring and summer. Avoid high‑phosphorus formulas.
When is the best time to prune Weeping Lilly Pilly?
Late winter or early spring, just before the main growth flush. For hedges, light tip‑pruning every 8–12 weeks during the growing season.
Is Weeping Lilly Pilly suitable for coastal gardens?
Yes. It tolerates salt spray and sandy soils, making it a go‑to for seaside plantings in eastern Australia and New Zealand.
How far apart should I plant Weeping Lilly Pilly for a hedge?
For a dense hedge, space plants 1.5–2 m apart. For a looser screen, 2.5–3 m. Tighter spacing gives quicker closure but requires more pruning.
Do birds eat the berries of Weeping Lilly Pilly?
Absolutely. Native birds such as rosellas, honeyeaters, and silvereyes are attracted to the purple berries. It’s a valuable wildlife plant.
Related reading
- Banksia Integrifolia: Height, Care, Roots, and Lifespan Guide — another Australian native with similar growth and root considerations.
- Basil Pesto Recipe: Ingredients, Step-by-Step, Common Mistakes — a garden‑to‑table companion for anyone growing edibles.
The connection: both resources offer practical guidance for home gardeners working with native plants.
Catherine Roy is Editor-in-Chief at Oz Briefly, overseeing editorial standards, publication decisions and corrections.