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North America Non-native Plant

Spearwood

Spearwood: A Lesser-Known Australian Acacia for Adventurous Gardeners If you’re the type of gardener who enjoys discovering plants that make your neighbors scratch their heads and ask What’s that?, then spearwood (Acacia doratoxylon) might just be your next garden adventure. This Australian native is one of those under-the-radar acacias that ...

Spearwood: A Lesser-Known Australian Acacia for Adventurous Gardeners

If you’re the type of gardener who enjoys discovering plants that make your neighbors scratch their heads and ask What’s that?, then spearwood (Acacia doratoxylon) might just be your next garden adventure. This Australian native is one of those under-the-radar acacias that doesn’t get much spotlight, but that doesn’t mean it’s without charm.

What Exactly Is Spearwood?

Spearwood is a member of the vast Acacia family, hailing from the land down under. Like many of its acacia cousins, it typically grows as a shrub or small tree, sporting the characteristic feathery foliage and cheerful yellow puff-ball flowers that make acacias so recognizable. The name spearwood hints at its sturdy nature, though this particular species tends to keep a relatively low profile in the gardening world.

Where Does It Come From?

This Australian native calls the western regions of Australia home, where it has adapted to the country’s famously challenging growing conditions. In its natural habitat, it deals with hot, dry summers and mild winters – conditions that have shaped its drought-tolerant personality.

Why You Might Want to Grow Spearwood

Here’s the thing about spearwood – it’s a bit of a mystery plant, which can be both exciting and frustrating. If you’re drawn to unique, conversation-starting plants and don’t mind a little gardening adventure, spearwood offers:

  • Drought tolerance once established
  • Attractive yellow blooms that support pollinators like bees
  • Low-maintenance growing habits typical of acacias
  • Potential as a specimen plant or natural screening

Growing Conditions and Care

Like most Australian natives, spearwood appreciates well-drained soil and plenty of sunshine. It’s not a fan of wet feet, so avoid planting it in areas that stay soggy. Think Mediterranean garden vibes – hot, dry, and sunny.

For USDA hardiness zones, you’re probably looking at zones 9-11, though limited cold tolerance information is available for this specific species. If you’re in a cooler climate, container growing might be your best bet so you can bring it indoors during cold snaps.

The Reality Check

Here’s where I need to be honest with you – reliable, detailed information about Acacia doratoxylon is surprisingly scarce. This could mean it’s either incredibly rare, not widely cultivated, or perhaps there’s some taxonomic confusion floating around. For the average gardener, this presents both an opportunity for botanical adventure and a potential headache.

Consider Native Alternatives

If you’re in North America and looking for that acacia aesthetic with more predictable results, consider exploring native alternatives that offer similar benefits:

  • Desert willow (Chilopsis linearis) for southwestern regions
  • Mesquite species (Prosopis) for arid climates
  • Native leguminous shrubs specific to your region

The Bottom Line

Spearwood sits in that interesting category of plants that are neither superstar garden performers nor garden villains – they’re simply uncommon. If you do decide to track down this elusive acacia, approach it as a gardening experiment rather than a sure thing. Make sure you source it from reputable suppliers, and don’t be surprised if it takes some detective work to find reliable growing information.

Sometimes the most rewarding garden plants are the ones that teach us something new, even if that lesson is simply appreciating the well-documented, tried-and-true natives that are perfectly adapted to our local conditions.

Spearwood

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 doratoxylon A. Cunn. - spearwood

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