North America Non-native Plant

Dalby Myall

Botanical name: Acacia stenophylla

USDA symbol: ACST5

Native status: Not native but doesn't reproduce and persist in the wild

Dalby Myall: A Graceful Australian Native for Water-Wise Gardens If you’re looking for a drought-tolerant tree that brings a touch of Australian elegance to your landscape, meet the Dalby myall (Acacia stenophylla). Also known as river cooba or river myall, this distinctive member of the wattle family has been quietly ...

Dalby Myall: A Graceful Australian Native for Water-Wise Gardens

If you’re looking for a drought-tolerant tree that brings a touch of Australian elegance to your landscape, meet the Dalby myall (Acacia stenophylla). Also known as river cooba or river myall, this distinctive member of the wattle family has been quietly winning over gardeners with its graceful weeping habit and remarkable ability to thrive in challenging conditions.

Where Does Dalby Myall Come From?

The Dalby myall is native to eastern Australia, where it naturally occurs across Queensland and New South Wales. In its homeland, you’ll find it growing along riverbanks and in semi-arid regions, which gives us a big clue about what this tree needs to thrive in cultivation.

What Makes This Tree Special?

Don’t expect typical leaves on a Dalby myall – instead, you’ll discover long, narrow, silvery-blue phyllodes (think of them as flattened stems that do the job of leaves). These distinctive leaves can reach up to 8 inches long and give the tree its characteristically elegant, weeping appearance. In late winter to spring, the tree produces clusters of bright yellow, fluffy ball-shaped flowers that are absolutely buzzing with activity from bees and butterflies.

Mature trees typically reach 20-30 feet tall with a similar spread, creating a beautiful umbrella-like canopy that provides dappled shade – perfect for those hot summer days.

Is Dalby Myall Right for Your Garden?

This tree is a champion for water-wise gardening. Once established, it’s incredibly drought tolerant and can handle poor soils that would stress many other trees. Here’s what makes it shine:

  • Excellent for xerophytic and Mediterranean-style gardens
  • Makes a stunning specimen tree or focal point
  • Great for windbreaks and erosion control on slopes
  • Perfect for rural properties or larger suburban lots
  • Attracts beneficial pollinators with its cheerful yellow blooms

However, there are a few things to consider. Dalby myall is only hardy in USDA zones 9-11, so it won’t tolerate hard frosts. If you live in cooler climates, you might want to explore native alternatives that offer similar drought tolerance and wildlife benefits.

Growing Your Dalby Myall Successfully

The good news is that once you understand this tree’s preferences, it’s relatively low-maintenance. Here’s how to set it up for success:

Planting Tips

  • Choose a spot with full sun – this tree loves bright, direct sunlight
  • Ensure excellent drainage; soggy soil is this tree’s worst enemy
  • Plant in spring after the last frost risk has passed
  • Space trees at least 20 feet apart to allow for mature spread

Care and Maintenance

  • Water regularly during the first year to help establish roots
  • Once established, water only during extended dry periods
  • Minimal pruning needed – just remove dead or crossing branches
  • No fertilizer required; this tree actually prefers lean soils
  • Protect young trees from frost with cloth or other covers

Wildlife and Pollinator Benefits

Your local pollinators will thank you for planting a Dalby myall. The bright yellow flowers are magnets for native bees, honey bees, and butterflies. The tree also provides nesting sites for birds, while the seeds can feed various wildlife species. It’s a wonderful way to support local ecosystems while creating a beautiful landscape feature.

The Bottom Line

Dalby myall is an excellent choice if you live in a warm, dry climate and want a distinctive tree that won’t demand constant attention. Its unique appearance, drought tolerance, and pollinator appeal make it a valuable addition to water-wise gardens. Just remember to give it plenty of space to show off that graceful weeping form, and you’ll have a stunning centerpiece that embodies the beauty of Australian native plants.

If you live outside its hardiness range, consider exploring native alternatives in your area that offer similar drought tolerance and wildlife benefits – your local native plant society can point you toward great options that will thrive in your specific climate and support your regional ecosystem.

Dalby Myall

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Fabales

Family

Fabaceae Lindl. - Pea family

Genus

Acacia Mill. - acacia

Species

Acacia stenophylla A. Cunn. ex Benth. - Dalby myall

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA