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Willow Acacia

Acacia salicina

Willow Acacia

A narrow, upright tree with fragrant cream puffball flowers and graceful willow-like foliage, perfect for tight screening spaces.

Hardy to about 15-18Β°F in low and mid desert; frost-sensitive when young.

AMWUA Notes

Low water use; can be short-lived if overwatered or left unpruned.

Care Guide

πŸ’§Watering

Deep-soak weekly through the first year, then every 2-3 weeks in summer once established.

βœ‚οΈPruning

Prune young trees to a single strong leader and thin the canopy to reduce wind resistance in the brittle wood; work in late winter.

🌱Fertilizing

No fertilizer needed; a nitrogen-fixing legume.

πŸ›‘οΈPests

Few pest problems.

β˜€οΈSeasonal Notes

Fragrant cream puffball flowers in spring; evergreen willow-like foliage with seasonal pod drop.

Soil, Feeding & Propagation

πŸͺ¨Soil

Well-draining native 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; establishes quickly from nursery stock

πŸ“Spacing

12–15 ft

🌳Roots & Placement

Deep roots are non-aggressive, but keep 10–12 ft from structures; brittle wood needs staking

Placement Tips

  • β€’Narrow upright form (about 15 ft wide) is ideal for tight screening, side yards, and against blank walls.
  • β€’Weak-wooded and brittle; stake young trees and prune early for strong structure, keeping 10-12 ft from buildings.
  • β€’Plant in a row 12-15 ft apart for a fast, fragrant privacy screen.
  • β€’Full sun; sheds seed pods, so keep back from pool skimmers.

Features

Narrow upright formFragrant cream flowersWillow-like foliageExcellent screen

Best Uses

Narrow screeningShade treeFragrant garden

Quick Stats

Water NeedsLow
Sun Exposurefull sun
Mature Size30 ft H Γ— 15 ft W
Growth Ratefast
Maintenancemoderate
HardinessUSDA 9-11
FoliageEvergreen
Drainagewell-drained
Bloom SeasonSpring
Bloom ColorCream
Litter Levelmoderate
ThornsNone
Native RegionAustralia

Design Styles

mediterraneanlow maintenance

Include in Your Project

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

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