SelecTree: Tree Detail
THORNLESS HONEY LOCUST
Gleditsia triacanthos var. inermis
Photo Locations: Morris Arboretum - Philadelphia, PA, Hoyt Arboretum - Portland, OR, Los Angeles County Arboretum - Arcadia, CA, Finch Arboretum - Spokane, WA and Arnold Arboretum - Boston, MA
Tolerates some drought. Grows poorly where ocean salt spray occurs.
Trees may be referred to as male or female.
A Gleditsia triacanthos var. inermis in Visalia is registered as a California Big Tree. It measures 76 feet high, with a trunk circumference of 126 inches and a crown spread of 18 feet.
Erect or Spreading and requires ample growing space.
Oval or Umbrella Shape.
Has Deciduous foliage.
Height: 60 feet.
Width: 40 feet.
Growth Rate: 36 or More Inches per Year.
Longevity 50 to 150 years or more.
Leaves Bipinnately Compound, Medium to Light Green, Gold, Deciduous.
Flowers Inconspicuous. Flowers in Spring or Summer. Has either male or female flowers (dioecious). Trees may be sold as male or female.
Few, Brown Pod, Very Large (Over 3.00 inches), fruiting in Summer or Fall.
Bark Black or Dark Brown, Fissured.
Shading Capacity Rated as Moderately Low in Leaf.
Shading Capacity Rated as Low out of Leaf.
Tree Site Conditions & Constraints
Sunset Zones 1 - 16 and 18 - 20.
USDA Hardiness Zones 4 - 9.
Exposure Full Sun to Partial Shade.
Wet to Dry Soil.
Loam or Sand Texture.
Highly Acidic to Highly Alkaline Soil pH.
Seaside Tolerance is Not Suited.
Pests & Disease Information
Resistant to Verticillium. Susceptible to Invasive Shot Hole Borer, Caterpillars, Insect Galls, Pod Gall Midge and Spider Mites, Mistletoe, Phytophthora and Root Rot.
Health, Safety & Environmental Concerns
Branch Strength Rated as Medium.
Root Damage Potential Rated as Moderate.
Allergy Health Hazard.
Attracts Birds and Bees.
Cite this tree:
SelecTree. "Gleditsia triacanthos var. inermis Tree Record." 1995-2020. Feb 27, 2020.
< https://selectree.calpoly.edu/tree-detail/gleditsia-triacanthos-inermis >