Honey Locust Maintenance
A popular Colorado shade tree valued for its filtered light, drought tolerance, and fast growth. While adaptable, Honey Locust is vulnerable to leaf-feeding insects, pod gall midge, canker diseases, and root/environmental stress in compacted urban soils.
- Species
- Honey Locust
- Botanical Name
- Gleditsia triacanthos var. inermis
- Group
- Deciduous Trees
- Tracked Problems
- 6
Seasonal Calendar
| Problem | Type | Active Season |
|---|---|---|
| Honey Locust plant bug | Insect | Spring |
| Honey Locust pod gall midge | Insect | Late Spring–Summer |
| Leafhoppers / Locust leafminer | Insect | Summer |
| Spider mites | Mite | Summer (hot/dry) |
| Canker diseases (Nectria, Thyronectria) | Fungus | Spring–Fall |
| Root decline (compaction, drought, overwatering) | Abiotic | Summer–Fall |
Pest & Disease Guide
Honey Locust Plant Bug
Common symptoms
- Leaves stippled or distorted in spring
- Premature leaf drop on new growth
- Small green bugs visible when disturbed
Treatment & management
- Usually cosmetic
- Natural predators often control them
- Professional spray only in severe outbreaks
Honey Locust Pod Gall Midge
Common symptoms
- Leaves curl into pod-like galls
- Tip dieback on new growth
- Distorted, bumpy leaflets
Treatment & management
- Prune off heavily infested tips
- Avoid excessive nitrogen
- Professional treatment if severe
Leafhoppers / Locust Leafminer
Common symptoms
- Bleached, stippled leaves
- Scorch-like browning in mid–late summer
- Leaf skeletonizing in severe cases
Treatment & management
- Typically cosmetic
- Deep watering reduces stress
- Professional treatment if widespread
Spider Mites
Common symptoms
- Fine stippling or bronzing
- Dusty, dull foliage
- Mites visible via paper tap test
Treatment & management
- Hose-rinse foliage
- Deep irrigate during heat
- Professional miticide if severe
Canker Diseases
Common symptoms
- Sunken or swollen bark areas
- Branch dieback from tips
- Fungal tissue under bark
Treatment & management
- Prune infected branches
- Sanitize tools
- No chemical cure
Root Decline / Environmental Stress
Common symptoms
- Early leaf yellowing
- Sparse canopy
- Leaf scorch in midsummer
Treatment & management
- Deep water every 2–3 weeks
- Improve soil drainage
- Avoid overwatering in clay soils
When to Worry
- Progressive branch dieback (possible canker)
- Heavy canopy-wide gall formation
- Unexplained mid-summer scorch
- Rapid canopy thinning
- Bark cracking or sunken trunk areas
Mostly Cosmetic
- Light spring stippling from plant bugs
- Localized leaf curling from mild gall midge
- Minor bronzing from leafhoppers or mites
- Early fall color from heat/drought
- Occasional thin canopy spots
Notes
These issues may require professional diagnosis and pruning.
These typically resolve with proper watering and seasonal recovery.
Related Resources
Related Services
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The Root exists to help you understand your landscape. When a tree needs hands-on evaluation, a Great Western arborist can look at it in person.