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Gleditsia triacanthos f. inermis

Gleditsia triacanthos f. inermis

Thornless honeylocust

synonym Gleditsia inermis

Description

Gleditsia triacanthos f. inermis (thornless honey locust) originated in North America in 1789 as a natural variation of the species. It has the same shape as the Gleditsia triacanthos, save for the important fact that the inermis is thornless. It grows into a large, rugged tree, up to more than 20 metres high and 10 metres wide. It has a beautifully transparent crown. It is assumed that most thornless Gleditsia cultivars are selections from f. inermis

In the springtime, Gleditsia triacanthos f. inermis buds pinnate, deep bronze-red leaves, which turn a fresh green colour around June. At the same time, the tree blooms discreet, yellow-green racemes. In autumn, the leaves are a beautiful golden yellow. After blooming, the striking, yellow-green legumes appear, that are between 30 and 45 cm long. Later on in the year, the long legumes turn red-brown. The bark is grey and furrowed.

Coastal winds, salt spray, dryness, air pollution and brief floods are well tolerated by Gleditsia triacanthos f. inermis. That makes the tree perfect for urban areas. The thornless honey locust is used a lot on lanes and streets, for example, but is also often found in central reservations. With a nectar and pollen value of 5, the tree is also excellent at producing pollen for bees. Gleditsia triacanthos f. inermis thrives in both dry and moist soil, with a neutral to acidic pH value and prefers a sunny environment.

Types of planting

Tree types

standard trees multi-stemmed trees characteristic trees

Topiary on stem

fval roof-trained fval pollard fval vase

Use

Location

street avenue square park central reservation large garden cemetery traffic areas, industrial zones windbreak bioswale

Pavement

none none open open sealed sealed

Planting concepts

eco planting prairie planting

Characteristics

Crown shape

ovoid ovoid

Crown structure

open open

Height

15 - 20 m

Width

10 - 15 m

Winter hardiness zone

5A - 8B

Aspects

Wind

slightly tolerant to wind slightly tolerant to coastal wind

Soil

loess sabulous clay light clay sand loamy soil

Nutrient level

moderately rich in nutrients rich in nutrients

Soil moisture level

dry moist wet

Light requirements

sun

pH range

acidic neutral alkaline

Host plant/forage plant

bees nectar value 5 pollen value 5

Extreme environments

tolerant to salt spray tolerant to dryness tolerates air pollution tolerant to short-term flooding

Get to know Ebben Nurseries

Visit our nurseries with multi-stem trees, climbing trees, trees for avenues and parks characteristic trees and solitary shrubs.

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Place order or further information?

Order this plant? Or would you like further information about Gleditsia triacanthos f. inermis? Make an appointment for a detailed planting recommendation.
Call +31(0) 485 31 20 21 or email one of our advisors directly.
Our planting advisors

Photos

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Seasonal colours

Gleditsia triacanthos f. inermis seizoenskleur
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Flowers

Flowers

raceme star-shaped pendulous scented

Flower colour

yellow-green

Flowering period

June - July

Leaves

Leaf colour

buds bronze pale green

Leaves

deciduous ovate pinnate nitrogen fixing

Autumn colour

golden yellow

Fruits

Fruit colour

red-brown

Fruits

striking pod

Bark

Bark colour

grey

Bark

furrowed

Twigs

Twig colour

grey-green

Twigs

thornless zigzagging

Root system

Root system

deep shallow fleshy roots

For and by green professionals

The TreeEbb is a platform for and by green professionals, in which we collect knowledge and experience from the sector and make this available for users. All the details and photos are free to use for non-commercial purposes. Want to share your tree knowledge? Send photographs and additional information to treeebb@ebben.nl

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Geographic location
Winter hardiness zone
OK
Coastal area
OK
Use
Location
OK
Pavement
OK
Host plant/forage plant
OK
Planting concepts
OK
Types of planting
Tree types
OK
Multi-stemmed trees
OK
Crown structure
OK
Crown shape
OK
Topiary on stem
OK
Topiary
OK
Height
m
-
m
OK
Width
m
-
m
OK
Aspects
Wind
OK
Soil
OK
Nutrient level
OK
Soil moisture level
OK
Light requirements
OK
PH range
OK
Extreme environments
OK
Stage of succession
OK
Plant characteristics
Flowering period
January
-
December
OK
Flower colour
OK
Leaf colour
OK
Autumn colour
OK
Fruit colour
OK
Bark colour
OK
Special features
OK
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