
Tree Health · Aspen
Aspen Tree Problems in Colorado Springs
Why yard aspens decline, and what helps.
Aspens are beautiful but often stressed at lower elevations. Cankers, borers and drought are the most common reasons they decline.
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Common aspen problems
Most aspen trouble starts with stress, which lets canker diseases and insects move in.
- Cankers: sunken, dark or orange patches on the bark
- Dieback of branches at the top
- Leaf spots and early leaf drop in wet springs
- Drought stress in hot, dry summers
What helps
Deep watering during dry spells, avoiding wounds from mowers and trimmers, and pruning out dead stems. Badly cankered stems should be removed.
Frequently Asked Questions
- Should I remove a dying aspen?
- Dead aspen stems get brittle and fall easily. Removing them keeps the rest of the grove healthier and your yard safer.
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