Key Characteristics
• Mature Size: 8–15 ft tall | 6–12 ft wide
• Growth Rate: Moderate
• Form: Upright, multi-stem shrub
• Flower Color: Purple, lavender, white (spring)
• Fragrance: Strong, classic lilac scent
• Lifespan: 50+ years under Front Range conditions
Planting & Care Considerations
• Full sun required for best flowering
• Good airflow reduces disease pressure
• Avoid overwatering; prefers well-drained soils• Remove older stems periodically to maintain vigor
Why Common Lilac Works on the Front Range
• Excellent cold hardiness for Front Range winters
• Thrives in alkaline soils common to the region
• Reliable spring flowering with minimal inputs
• Long-lived shrub with historic performance in Colorado
Common Problems
• Powdery mildew in shaded or crowded sites
• Lilac ash borer in stressed plants
• Reduced flowering in low-light conditions
Best Use Scenarios
• Informal hedges and screens
• Large shrub borders
• Traditional landscapes and heritage plantings
• Sites prioritizing fragrance and spring bloom
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