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GLEDITSIA triacanthos (SPECTRUM™)

Image of Gleditsia triacanthos f. inermis 'Speczam' (SPECTRUM™)

Family

Fabaceae

Botanical Name

GLEDITSIA triacanthos f. inermis 'Speczam'(SPECTRUM™)

Plant Common Name

Thornless Honeylocust

General Description

Honeylocust is a spiny, lacy-leaved, medium to large deciduous tree native to the central and eastern United States and southern Ontario. The thornless cultivar Spectrum™ has golden-yellow spring foliage that stays yellower than that of Gleditsia triacanthos Sunburst®.

Like other honeylocusts, Spectrum™ has pinnately compound leaves that emerge relatively late in spring and cast filtered shade. This cultivar's leaves flush bright golden yellow in spring, fade to greenish yellow in summer, and turn dull yellow before dropping in autumn. Fallen leaves create relatively little mess. The trunk has gray-brown, shallowly fissured bark that lacks the formidable spines typical of most honeylocusts. Clusters of inconspicuous greenish flowers appear in spring, with no seedpods following. This cultivar grows into a medium-sized, round-crowned tree.

Honeylocust likes sun and is adapted to a wide variety of soil types. Thornless selections make good shade trees, although overuse of this species has led to increasing cultural problems.

Characteristics

  • AHS Heat Zone

    9 - 1

  • USDA Hardiness Zone

    3 - 9

  • Sunset Zone

    1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20

  • Plant Type

    Tree

  • Sun Exposure

    Full Sun

  • Height

    30'-35' / 9.1m - 10.7m

  • Width

    25'-30' / 7.6m - 9.1m

  • Bloom Time

    Late Spring

  • Native To

    Northeastern United States, Southeastern United States, North-Central United States, Central United States, South-Central United States, Canada

Growing Conditions

  • Soil pH

    Acidic, Neutral, Alkaline

  • Soil Drainage

    Well Drained

  • Soil type

    Loam

  • Tolerances

    Salt

  • Growth Rate

    Fast

  • Water Requirements

    Average Water

  • Habit

    Oval/Rounded

  • Seasonal Interest

    Spring, Summer

Ornamental Features

  • Flower Interest

    Insignificant

  • Flower Color

    Yellow Green

  • Foliage Color (Spring)

    Yellow, Gold

  • Foliage Color (Summer)

    Chartreuse, Yellow Green

  • Foliage Color (Fall)

    Light Yellow

  • Bark Color

    Brown, Sandy Brown, Gray

  • Fragrant Flowers

    Yes

  • Fragrant Fruit

    No

  • Fragrant Foliage

    No

  • Bark or Stem Fragrant

    No

  • Flower Petal Number

    Single

  • Repeat Bloomer

    No

  • Showy Fruit

    No

  • Edible Fruit

    No

  • Showy Foliage

    Yes

  • Foliage Texture

    Fine

  • Foliage Sheen

    Matte

  • Evergreen

    No

  • Showy Bark

    No

Special Characteristics

  • Bark Texture

    Fissured

  • Usage

    Feature Plant, Shade Trees, Street Trees, Topiary / Bonsai / Espalier

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Self-Sowing

    No