The blueberry ash tree (Elaeocarpus reticulatus) is an evergreen Australian native with fringed white or pink bell flowers and bright blue berries that attract birds. It suits Sydney gardens as a small feature or screening tree, in sun or part shade, where you have room for a rounded canopy.
This guide covers the full grown size, planting, care, pruning and problems, and when to call an arborist or check council rules.
Key points
- A garden-grown blueberry ash tree usually reaches about 4 to 10 m tall and 3 to 5 m wide (indicative — check the plant label), so allow space away from the house.
- It prefers moist, well-drained, slightly acidic soil in sun or part shade, and it dislikes dry, windy or heavy clay sites.
- Maintenance is low: mulch, water young plants in dry weather and prune lightly to shape in spring or after flowering.
- Watch-out: some Sydney councils protect trees above set sizes, and pruning high branches is a job for a qualified arborist, which costs about $230 to $1,375 per tree (October 2026).
Blueberry ash tree at a glance
| Feature | Detail |
|---|---|
| Botanical name | Elaeocarpus reticulatus (also called blue berry ash or fairy petticoats) |
| Plant type | Evergreen small tree or large shrub |
| Mature size | About 4 to 10 m tall and 3 to 5 m wide in gardens (indicative — check the plant label) |
| Sun | Full sun to part shade; best with some afternoon shade in hot western Sydney |
| Soil | Moist, well-drained, slightly acidic, rich in organic matter |
| Water | Regular while young, then moderate; mulch to hold moisture |
| Frost tolerance | Young plants need frost protection; mature trees cope with light frosts |
| Flowering season | Spring to early summer, followed by blue berries (indicative — check the plant label) |
| Native? | Yes, native to eastern Australia including coastal NSW rainforest margins |
Full grown blueberry ash tree: height and spread
Wild trees can grow taller than garden specimens, and the size you get depends on soil, light and pruning.
| Form or situation | Size | Best use | Notes |
|---|---|---|---|
| Standard garden tree | About 4 to 8 m tall (indicative — check the plant label) | Feature tree, privacy screen | Rounded canopy with glossy, serrated leaves |
| Tall rainforest-edge tree | Up to about 10 m or more in rich, sheltered sites (indicative — check the plant label) | Large blocks and shade | Needs space and council checks before work |
| Pruned or shaped plant | About 3 to 4 m tall (indicative — check the plant label) | Hedge or screen | Regular light pruning keeps it compact |
| Container-grown specimen | About 1.5 to 2 m (indicative — check the plant label) | Courtyards and entries | Needs a large pot and regular watering |
| Dwarf or compact selections | Smaller than the species (indicative — check the plant label) | Small gardens | Ask your nursery which forms they stock |
| Elaeocarpus reticulatus height in the wild | Taller than garden plants (indicative — check the plant label) | Bush regeneration | Garden plants stay smaller in dry, exposed spots |
Where to plant a blueberry ash tree in Sydney
- Choose a sheltered spot with morning sun and some afternoon shade, because hot westerlies in summer scorch the foliage of young plants.
- Allow at least 3 to 4 m from the house, fences and neighbours (indicative — check the plant label), since the canopy spreads wider as it matures.
- Avoid compacted clay in western Sydney unless you improve drainage with compost and a raised mound.
- Sandy coastal soils on the Northern Beaches need compost and mulch, because the tree prefers moisture-holding soil.
- Grow young plants in large pots for a few years if your garden is small, using a premium native mix.
- Keep the tree well away from drains, pipes and paving, and ask a licensed plumber about underground services before you dig.
How to plant a blueberry ash tree
- Plant in autumn or early spring, when the soil is warm and rain will help new roots establish.
- Check the site for overhead wires and underground services before you dig; call Dial Before You Dig if unsure.
- Dig a hole about twice as wide as the root ball and the same depth as the pot.
- Loosen circling roots gently, place the tree upright and backfill with the existing soil mixed with a little compost.
- Water in thoroughly with a hand-held hose fitted with an instant on-off trigger nozzle, and water before 10 am or after 4 pm.
- Mulch with 5 to 7 cm of organic mulch (indicative — check the product instructions), keeping it clear of the trunk.
- Stake only if the tree is exposed to wind, and remove the stake after a year.
Caring for a blueberry ash tree
Young trees need steady moisture, and an established tree rewards a good mulch layer. A tree under a taller canopy in the Inner West often copes better with dry summers than an exposed one.
| Task | When | How |
|---|---|---|
| Watering | Spring to autumn | Water deeply once or twice a week while young and in dry spells, within Sydney Water’s Water Wise Guidelines. |
| Feeding | Early spring | Use a slow-release native or tree fertiliser and follow the label exactly; avoid high-phosphorus products unless the label says they suit natives. |
| Mulching | Spring and autumn | Top up organic mulch to hold moisture and keep roots cool. |
| Light pruning | After flowering | Remove dead wood and shape lightly from the ground with clean secateurs or a pole pruner. |
| Frost protection | Winter | Cover young plants with frost cloth in the Blue Mountains and cooler western suburbs. |
| Pest and disease watch | Spring to autumn | Look for sap-sucking insects and sooty mould; for infestations, see a pest controller. |
Pruning and using a blueberry ash tree as a screen
Blueberry ash tolerates light shaping, and it makes a good privacy screen when planted in a row.
- Prune after flowering so you do not remove next season’s blooms, and remove no more than a third of the canopy in one year.
- Cut dead, crossing or damaged branches back to the branch collar using sharp, clean tools.
- Only prune what you can safely reach from the ground; hire a qualified arborist for work above head height, near power lines or on large trees.
- Check your council’s tree rules before pruning heavily or removing the tree, because many councils need approval above set sizes or for listed species.
- For a screen, plant in a row with spacing based on the nursery label (indicative — check the plant label) and trim lightly each year.
- Wear eye protection, gloves and closed shoes, and keep children and pets away while you work.
Common blueberry ash tree problems
| Symptom | Likely cause | Fix |
|---|---|---|
| Yellow leaves | Poor drainage or nutrient deficiency | Improve drainage, mulch well and use a slow-release native fertiliser on the label. |
| Brown, scorched leaf edges | Hot wind or dry soil | Water deeply, mulch and add afternoon shade for young trees. |
| Leaf drop | Drought stress or transplant shock | Water regularly and avoid moving the tree. |
| Few flowers or berries | Heavy pruning or too much shade | Prune lightly after flowering and increase light. |
| Black sooty coating on leaves | Sap-sucking insects and mould | See a pest controller; do not mix sprays yourself. |
| Lifting paving or cracks near the trunk | Roots too close to hard surfaces | Ask an arborist before cutting any large roots. |
FAQ: blueberry ash tree questions
How tall is a full grown blueberry ash tree?
Most garden plants reach about 4 to 10 m tall and 3 to 5 m wide (indicative — check the plant label). Rainforest trees can grow taller, while pruned plants stay smaller. Soil, light and shelter affect the final size, so ask your nursery about local examples.
What is blue berry ash?
Blue berry ash is another way people write blueberry ash, the common name for Elaeocarpus reticulatus. It is an evergreen Australian native tree with fringed flowers and blue berries. It is also called fairy petticoats in some nurseries.
What is the Elaeocarpus reticulatus height?
The Elaeocarpus reticulatus height varies, from about 4 m in small gardens to taller in sheltered rainforest sites (indicative — check the plant label). The label on your plant is the best guide for your climate. Regular light pruning helps keep it compact.
Are the blue berries edible?
Do not eat any berries unless you have positively identified the plant and confirmed it is safe. Blueberry ash berries are mainly food for birds. Keep children and pets from eating them, and contact your vet or the Animal Poisons Helpline if a pet does.
Next step: get tree pruning help in Sydney
If your tree has grown beyond what you can safely reach, we can arrange qualified help. Sydney tree pruning typically costs about $230 to $1,375 per tree (October 2026), with a typical price of about $520. Read our pruning guide for timing and technique, or request a tree pruning quote.
