Autumn Blaze Tree
(Acer × freemanii ‘Autumn Blaze’)
Autumn Blaze Maple is popular for fast growth and vivid fall color. In Colorado, it performs better than Red Maple but can still struggle with chlorosis, leaf scorch, borers, and structural issues as it matures.
Seasonal Pest & Disease Calendar
| Problem | Type | Active Season |
|---|---|---|
| Chlorosis | Abiotic | Spring–Summer |
| Maple borers | Insect/borer | Summer |
| Aphids | Insect | Spring–Fall |
| Scale insects | Insect/scale | Spring crawlers; visible year-round |
| Verticillium wilt | Fungus | Spring–Fall |
| Leaf scorch | Abiotic | Summer–Fall |
| Girdling roots / structural issues | Structural | Visible year-round |
Pest & Disease Guide (Homeowner-Friendly)
Chlorosis
Common symptoms- Yellow leaves with green veins
- Reduced growth
- Iron treatments
- Improve drainage
- Reduce soil compaction
Maple Borers
Common symptoms- Exit holes
- Canopy dieback
- Reduce drought stress
- Protect trunk
Aphids
Common symptoms- Honeydew
- Sooty mold
- Rinse foliage
- Encourage predators
Scale Insects
Common symptoms- Bumps on bark
- Yellowing foliage
- Horticultural oil
- Treat crawler stage
Verticillium Wilt
Common symptoms- One-sided wilt
- Branch dieback
- No cure
- Prune affected limbs
Leaf Scorch
Common symptoms- Brown crispy edges
- Early fall color
- Deep watering
- Mulch root zone
Structural Issues
Common symptoms- Tight branch unions
- Uneven canopy
- Structural pruning early
- Inspect root flare
When to Worry vs. When It’s Cosmetic
When to Worry (action recommended)
- Severe chlorosis
- Borer damage
- Repeated wilt symptoms
- Structural cracks or splitting
These can lead to decline or branch failure over time.
Mostly Cosmetic (monitor only)
- Minor aphids
- Light scorch in heat
- Occasional scale patches
These usually improve with irrigation and seasonal care.