SelecTree: Tree Detail
Gleditsia triacanthos var. inermis 'Skyline'
Photo Locations: Morton Arboretum - Lisle, IL and Boething Treeland Farms
Tolerates some drought. Grows poorly where ocean salt spray occurs. Has few or no pods.
Trees may be referred to as male or female.
Erect or Spreading with a High Canopy.
Conical or Umbrella Shape.
Has Deciduous foliage.
Height: 45 feet.
Width: 40 feet.
Growth Rate: 36 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 or Purple Pod, Very Large (Over 3.00 inches), fruiting in Summer or Fall.
Bark Black or Dark Brown, Furrowed or Smooth.
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.
Cite this tree:
SelecTree. "Gleditsia triacanthos var. inermis 'Skyline' Tree Record." 1995-2019. Feb 23, 2019.
< https://selectree.calpoly.edu/tree-detail/gleditsia-triacanthos-inermis-skyline >
SelecTree Nursery Connection Map
Cal Poly / ESRI