Key Characteristics
• Mature Size: 45–55 ft tall | 35–45 ft wide
• Growth Rate: Moderate
• Form: Upright oval to rounded canopy
• Fall Color: Deep purple to maroon
• Lifespan: 40–60+ years with proper care
Planting & Care Considerations
• Full sun preferred for best growth and color
• Allow adequate space for mature canopy
• Deep, consistent watering during establishment• Structural pruning when young improves branch strength
Why The Autumn Purple Ash Works on the Front Range
• Excellent cold hardiness and wind tolerance
• Adapts well to alkaline soils common along the Front Range
• More consistent fall color than many ash varieties
• Performs well in urban and residential landscapes
Common Problems
• Susceptible to Emerald Ash Borer (EAB) without protection
• Occasional leaf scorch during extreme heat or drought
• Branch breakage if poorly structured when young
Best Use Scenarios
• Residential shade tree
• Streetscapes and parkways (with EAB management)
• Wind-exposed Front Range sites
• Landscapes seeking strong fall color
Great Western Tree Care
Larkspur, CO Location
Mon - Fri: 8a to 5p
9575 Spruce Mountain Rd
Larkspur, CO 80118
(720) 535-8769
Aurora, CO Location
Mon - Fri: 8a to 5p
10730 E Bethany Dr
Aurora, CO 80014
(303) 913-7749