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Mulga

Acacia aneura

Mulga

A compact Australian tree with striking yellow rod-shaped blooms, ideal for small desert patios and tight spaces.

Hardy to roughly 18-20Β°F, suited to low and mid desert; a warm-climate Australian native that appreciates protection from hard frost while young.

AMWUA Notes

Drought tolerant once established; avoid frequent shallow watering, which produces weak growth.

Care Guide

πŸ’§Watering

Deep-soak weekly through the first summer to establish, then a deep soak every 2-3 weeks in summer heat and monthly in winter.

βœ‚οΈPruning

Needs little pruning; remove lower limbs to raise the canopy and thin lightly for shape in late winter after bloom.

🌱Fertilizing

No fertilizer needed; as a nitrogen-fixing acacia it makes its own in lean desert soil.

πŸ›‘οΈPests

Largely pest-free in the desert.

β˜€οΈSeasonal Notes

Yellow rod-shaped flowers appear in spring; the gray-green phyllodes are evergreen year-round.

Soil, Feeding & Propagation

πŸͺ¨Soil

Deep, well-draining native, sandy, or decomposed-granite soil; tolerates caliche, rocky ground, and alkaline pH 7.5–8.5

πŸ’§Drainage

Needs well-drained soil.

🌱Nutrient Needs

None β€” thrives in lean desert soil without fertilizer.

🌰Propagation

Grown from scarified seed; nursery-grown transplants establish readily in fall or spring

πŸ“Spacing

10–15 ft

🌳Roots & Placement

Deep, non-aggressive roots; safe near pools, patios, and foundations at 6–8 ft

Placement Tips

  • β€’Mature spread is only about 15 ft, so it fits narrow side yards and courtyards; space 10-12 ft from other trees.
  • β€’Thornless with low litter, making it one of the safest small trees to plant within a few feet of pools, patios, and seating.
  • β€’Stake and train to a single leader while young to develop a clean patio-tree canopy.
  • β€’Site in full sun; tolerates reflected heat against west- and south-facing walls.

Features

Compact sizeLow litterYellow rod-shaped flowersAustralian native

Best Uses

Small spacesPatio treeScreening

Quick Stats

Water NeedsLow
Sun Exposurefull sun
Mature Size20 ft H Γ— 15 ft W
Growth Ratemoderate
Maintenancelow
HardinessUSDA 9-11
FoliageEvergreen
Drainagewell-drained
Bloom SeasonSpring
Bloom ColorYellow
Litter Levellow
ThornsNone
Native RegionAustralia

Design Styles

mediterraneanlow maintenance

Include in Your Project

Love Mulga? Our landscape team sources from wholesale nurseries and can incorporate it into your design.

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Use this care guide to maintain your Mulga. Questions about your landscape? Reach out anytime.

Data from 2024 AMWUA β€œLandscape Plants for the Arizona Desert” guide.