Gleditsia tri. var. inermis 'Skyline'

Skyline Thornless Honeylocust

Gleditsia triacanthos var. inermis ‘Skyline’ is a fast-growing, thornless deciduous tree valued for its strong central leader and symmetrical, pyramidal to oval form. Fine-textured green leaves emerge in spring, create light, filtered shade through summer, and turn soft yellow in fall, while blooms are small and not ornamentally significant. Its uniform structure and durability make it one of the most widely used honeylocusts for streets and large landscapes.

Type: Deciduous tree

Mature Size:
Width: 30–35 ft
Height: 40–50 ft
(10-year size: approx. 20–25 ft tall × 15–20 ft wide)

USDA Zones: 4a–9b
Form: Pyramidal to oval, strong central leader
Light: Full sun
Soil: Highly adaptable; tolerates poor, compacted, and urban soils
Water: Moderate; drought tolerant once established

Wildlife: Attracts bees; provides light habitat for birds


Features & Landscape Uses


Strong, uniform shape ideal for streets and avenues



Light, filtered shade suitable for turf and plantings



Reliable, widely used urban shade tree



Tolerates heat, drought, salt, and pollution




Care
Very low-maintenance and durable. Plant in full sun for best growth and structure. Prune when young to maintain a strong central leader and good branch spacing. Tolerates urban stress, heat, and drought. Generally pest- and disease-resistant, though occasional honeylocust pests may occur.

Plant type

Deciduous Tree, Shade Tree

Height

40-50'

Width

30-35'

Hardiness zones

4–9

Sunlight

Full Sun

Growth rate

Moderate

Bloom time

Spring

Leaf color

Green

Fall color

Yellow

Soil

Highly Adaptable

Landscape use

Accent Plant, Specimen

Shape

Oval, Pyramidal

Fruit

Yes

Deer resistant

Yes

Salt tolerant

Yes

Drought tolerant

Yes

10-year height

15-20'

10-year width

20-25'