Tree
Thornless Common Honeylocust
Gleditsia triacanthos var. inermis
Features
Compound leaves with small leaflets, leading to a dappled shade under the tree; autumn color usually yellow.
Culture
Full sun; moist, well drained soil; tolerates drought, high pH, and salt.
Cultivars
Many, including
- 'Imperial'-somewhat vase shaped, produces a few seed pods, vary hardy.
- 'Moraine'-seedless, broad vase shape, good yellow fall color.
- 'Skyline'-seedless, pyramidal form, good fall color, very hardy.
Mature Height
40-70 Feet
Size
Medium
Large
Mature Form
Rounded to broad spreading, rather open
Native To:
United States (and Illinois)
USDA Hardiness Zone
5 - 8
Soil Conditions
Dry
Moist, Well-Drained
Tolerance
Alkaline Soil
Dry Sites
Salt
Wind
Exposure/Light Requirements
Full Sun
Uses
Shade
Street
Foliage Color
Green
Fall Foliage Color
Yellow
Pests and Problems
Environmental Damage
Fungal Disease
Insect Damage
Additional pests and problems that may affect this plant:
Honeylocust borer, webworm, spider mites, plant bugs, canker, leaf spot, powdery mildew, and root rot.
Additional Notes
Many insect and disease problems have become serious due to the overuse of this species; cultivars that produce seed pods can be messy.
Related Resources
Home, Yard & Garden Pest Guide
The Home, Yard & Garden Pest Guide (C1391) provides is written for homeowners and other residents and provides nonchemical and current chemical recommendations for controlling pests associated with trees, shrubs, turf, flowers, groundcovers, vegetables, fruit, and houses. In addition, you'll find detailed information about integrated pest management, pesticide safety, and pesticide application and calibration techniques. This publication may be purchased at your local University of Illinois Extension Unit office, or by calling 800-345-6087, or by placing an order online (search for "C1391").
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Illinois Commercial Landscape and Turfgrass Pest Management Handbook
The Illinois Commercial Landscape and Turfgrass Pest Management Handbook (ICLT) is written for professional applicators and provides nonchemical and current chemical recommendations as well as application timing information for all major pests of turf, woody ornamentals and herbaceous ornamentals. This publication may be purchased at your local University of Illinois Extension Unit office, or by calling 800-345-6087, or by placing an order online (search for "ICLT").
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U of IL - Distance Diagnosis through Digital Imaging
A free plant, weed, insect and disease identification service available through your local University of Illinois Extension office. Center Educators or State Specialists review & respond to information and digital images submitted by local Extension office personnel. Some samples may require further examination or culture work (nominal fee involved) at the U of IL Plant Clinic.
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U of IL - Plant Clinic
Services include plant and insect identification, diagnosis of disease, insect, weed and chemical injury (chemical injury on field crops only), nematode assays, and help with nutrient related problems, as well as recommendations involving these diagnoses. Microscopic examinations, laboratory culturing, virus assays, and nematode assays are some of the techniques used in the clinic.
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