Plant Name: Hybrid Aussie Willow
Scientific Name: Salix × ‘Austree’ — Austree Hybrid Willow, Australian Hybrid Willow
Mature Height: 50–70 ft
Mature Spread: 25–35 ft
Growth Rate: Very fast (4–8 ft/year under favorable conditions)
Sun: Full sun
Water: High; 5–10 gal per watering while establishing, 2–3 times/week during hot, dry weather; 15–25 gal per watering once established during extended dry periods
Foliage: Long, narrow, green leaves; deciduous
Fall Color: Yellow to yellow-green
Flower Color: Yellow-green catkins
Bloom Time: Early spring
Fruit: Small seed capsules; seed production varies by hybrid
Hardiness Zones: 3–9 (−40°F to 30°F)
Features: Extremely fast-growing; excellent for windbreaks, privacy screens, and rapid shade; adaptable to many soil types
Additional Facts: Austree is a hybrid of white willow (Salix alba) and Chinese willow (Salix matsudana), not the Australian willow Geijera parviflora. It grows rapidly when supplied with abundant moisture and can reach 50–70 ft tall. Plant well away from foundations, septic systems, and underground utilities because of its extensive root system.