Thornless Common Honeylocust (Gleditsia triacanthos var. inermis)-Hort Answers - University of Illinois Extension
University of Illinois Extension

University of Illinois Extension

Hort Answers

Tree

Thornless Common Honeylocust
Gleditsia triacanthos var. inermis

Thornless Common Honeylocust leaves
Thornless Common Honeylocust leaves
 
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
Illinois Commercial Landscape and Turfgrass Pest Management Handbook
U of IL - Distance Diagnosis through Digital Imaging
U of IL - Plant Clinic