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Syzygium smithii
Lilly Pilly
Syzygium smithii
Syzygium smithii, commonly known as Lilly Pilly, is a fast-growing, evergreen tree or large shrub native to the coastal regions of eastern Australia. It is highly valued for its ornamental appeal, especially in hedging and screening, due to its dense foliage, vibrant new growth which ranges from pink to reddish hues, and attractive berries. The leaves are glossy green, oval to lance-shaped. In spring and summer, it produces fluffy, white to cream-coloured flowers, followed by edible, pear-shaped berries that ripen to a magenta or reddish-purple colour. These berries are often described as tart or bland but can be used in jams, jellies, or preserves. It is a hardy and adaptable plant, tolerant of various soil types and conditions once established.
CategoryDetails
Plant TypePerennial plant
Culinary UsageEdible plant
Duration to maturity3 years to harvest
Estimated Plant Lifespan50 years lifespan
Sun Requirements4-6 hours direct sunlight (Partial Sun)
Pollination

Method: animal

Notes: Pollinated primarily by insects (like bees) and birds which are attracted to its fluffy white flowers. The flowers are also attractive to native butterflies. Manual pollination is not typically needed for home garden productivity.

Watering Requirements

Method: top water

Frequency: When soil is dry to the touch, especially for young plants. Established plants are moderately drought tolerant but benefit from regular watering during dry periods.

Notes: Ensure excellent drainage to prevent waterlogging, which can lead to root rot. Deeper, less frequent watering is preferable for established plants to encourage deep root growth.

Humidity Requirements

Level: moderate

Maintenance: Generally tolerant of average humidity levels in temperate climates. In very dry conditions, mulching around the base of the plant can help maintain soil moisture, which contributes to a more humid microclimate around the plant.

Care InstructionsRegular pruning is beneficial for maintaining the desired shape, density, and promoting new, colourful growth, especially when used as a hedge. Prune after flowering or fruiting. Remove any dead, diseased, or crossing branches. Mulching around the base helps retain moisture and suppress weeds. Fertilize sparingly with a low-phosphorus native plant fertilizer, especially if soil is poor.
Temperature Range

Min: -5°C

Max: 40°C

Alternative NamesAcmena smithii, Monkey apple, Lilly-Pilly Tree, Eugenia smithii

Cultivars

Acacia cognata
Bower Wattle
Acacia cognata
Both Syzygium smithii and Acacia cognata are Australian natives that thrive in similar well-drained soil conditions. Acacia cognata, as a nitrogen-fixing legume, can enrich the soil, benefiting the Syzygium. Its fine, weeping foliage provides an attractive textural contrast and can offer dappled shade to the understory, mimicking natural Australian bushland environments.
Poa labillardierei
common tussock grass
Poa labillardierei
Native grasses like Poa labillardierei can be planted as a groundcover around Syzygium smithii. They help to suppress weeds, retain soil moisture, and protect the soil from erosion, reducing competition from undesirable plants while creating a naturalistic understory that complements the Syzygium's form.
Dicksonia antarctica
man fern
Dicksonia antarctica
For a lush, rainforest-inspired garden, Soft Tree Ferns can be excellent companions. They prefer similar moist, well-drained conditions and partial shade, which can be provided by a maturing Lilly Pilly. The ferns' large fronds offer a beautiful textural contrast to the dense foliage of the Syzygium, enhancing biodiversity and contributing to a cooler, more humid microclimate.
Eucalyptus grandis
Flooded Gum
Eucalyptus grandis

Large, fast-growing Eucalyptus species like Flooded Gum have extensive, competitive root systems and high water and nutrient demands. Planting them too close to Syzygium smithii would lead to significant competition for resources, potentially stunting the growth and health of the Lilly Pilly, especially during establishment.

Ficus microcarpa
Chinese banyan
Ficus microcarpa

Ficus microcarpa, particularly in its tree form, develops a very aggressive and wide-spreading root system that can outcompete nearby plants for water and nutrients. Its dense canopy can also cast significant shade, hindering the Syzygium's access to light, leading to poor growth if planted in close proximity.

Lilly Pilly Psyllid

These small sap-sucking insects (Trioza eugeniae) are a very common pest of Syzygium smithii. Their feeding causes characteristic dimpling, pitting, and distortion of new leaves, particularly on young shoots. Heavy infestations can lead to significant aesthetic damage and reduced plant vigor.

Aphids

Aphids are small, soft-bodied insects that cluster on new growth, stems, and the undersides of leaves, sucking plant sap. Infested plants may show curled, distorted leaves, sticky honeydew secretions (which can lead to sooty mould), and stunted growth. They are particularly active on new, tender shoots.

Scale Insects

Scale insects appear as small, immobile bumps on stems and leaves, often resembling waxy or cottony growths. They feed by sucking sap, leading to yellowing leaves, stunted growth, and sticky honeydew secretions that attract ants and encourage the growth of sooty mould.

Steps:

    • Take semi-hardwood cuttings (about 10-15 cm long) from healthy, disease-free parent plants, ideally in late summer or autumn.
    • Remove leaves from the bottom half of the cutting.
    • Dip the cut end into a rooting hormone powder or gel.
    • Plant cuttings into a well-draining propagating mix (e.g., equal parts coarse sand and peat or perlite).
    • Water thoroughly and place in a warm, humid environment, such as a propagating tray with a clear lid or under mist.
    • Maintain consistent moisture in the soil, avoiding waterlogging.
    • Rooting typically occurs within 6-12 weeks. Once rooted, transplant into individual pots.
    • Collect ripe berries from the plant.
    • Remove the fleshy outer pulp by washing or rubbing to expose the seed.
    • Sow fresh seeds directly into a well-draining seed-raising mix.
    • Lightly cover the seeds with mix and keep consistently moist.
    • Germination can be erratic and may take several weeks to months.

Neem oil spray

An effective natural insecticide for controlling common pests like psyllids, aphids, and scale insects by disrupting their feeding and reproduction cycles. It's safe for beneficial insects once dry.

Insecticidal soap

Useful for suffocating soft-bodied pests like aphids and psyllids on contact. It is biodegradable and has low toxicity to non-target organisms.

Native plant slow-release fertilizer

Provides balanced nutrition tailored for Australian native plants, typically low in phosphorus, which is beneficial for Syzygium smithii. Slow-release formulations ensure steady nutrient supply over time, promoting healthy growth.

Compost

Incorporating compost into the soil improves structure, drainage, and water retention, while providing a slow release of nutrients, enhancing overall plant health and vigor.

Mulch (e.g., wood chips or bark)

Applying a layer of organic mulch around the base of the plant helps to conserve soil moisture, regulate soil temperature, suppress weeds, and gradually add organic matter to the soil, promoting root health.