Simple to doubly pinnate, later shoots at the end of May (beginning of June), fresh green; yellow-green in autumn, rarely yellow, in October; foliage loose like ferns, casting light shade.Gleditsia triacanthos – Honey Locust (eastern North America)
Habit: Asymmetrical large tree with loose crown, 15-25 m tall, 8-10 m wide, sometimes umbrella-shaped when old; main branches reaching up like a fork, twigs horizontal with nodding tips, overhanging greatly in the lower crown; fast growth when young, 60-100 cm year, after 10 years noticeably slower, 20-30 cm.
Flowers: Modest, greenish white panicles; slightly fragrant, June to July.
Fruits: Only has luxurious fruit in temperate zones, pretty, leathery, brown husks, 20-40 cm long.
Leaves: Simple to doubly pinnate, later shoots at the end of May (beginning of June), fresh green; yellow-green in autumn, rarely yellow, in October; foliage loose like ferns, casting light shade.
Twigs: Very thorny, simple on young twigs, thorny clusters on branches and small stems.
Roots: Not sensitive, shallow to moderately deep, far-reaching, tolerate covering, open tree-grid better; do not collect nitrogen; unlike Robinia, no runners.
Demands: Not demanding, sun, tolerates heat, moderately frost hardy, with occasional frost damage, small specimen more sensitive than large ones; tolerates long droughts; good for urban and industrial areas, sensitive to wind.
Soil: Good on fresh or moist soil; poor, well drained, sandy-loamy or sandy-gravely substrates are favourable, slightly acidic to very alkaline, the more nutritious and heavier the soil, the greater the danger of frost damage and breakage due to wind.
Note: Never cut in spring as the wounds bleed and weaken the tree.
Hardiness: Zone 6a