Gleditsia triacanthos 'Speczam'

Speczam Honey locust

synonym Gleditsia triacanthos 'Spectrum'

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Description

Gleditsia triacanthos ‘Speczam’ (‘Speczam’ honey locust) is a selection of Gleditsia triacanthos ‘Sunburst’ and was patented by Lake County Nursery, Ohio, USA. This thornless cultivar has a more upright form than ‘Sunburst’, with a narrower growth habit. ‘Speczam’ can grow to be 10 metres tall, with a width of 6 to 7 metres. The crown is open and egg-shaped.

In June, this honey locust blossoms with small, discrete but highly fragranced racemes of flowers. The yellow, oval-shaped emerging leaves are unipinnate or bipinnate. Gleditsia triacanthos ‘Speczam’ keeps its yellow-green leaves and twigs throughout the whole summer. This is in contrast to ‘Sunburst’, which turns greener after the burst of yellow in the spring. In the autumn, the leaves of the ‘Speczam’ turn a beautiful golden yellow. The bark is slightly grooved and is grey in colour. The cultivar does not bear fruit.

Drought, air pollution, road salt and short wet periods are all tolerated well by Gleditsia triacanthos ‘Speczam’. The selection is versatile and can be used in streets, avenues, on squares, at car parks and in parks. But the honey locust ‘Speczam’ also thrives well on central reservations, in large and small gardens and at cemeteries. It is a fantastic tree for bees and butterflies with a high nectar and pollen score. Plant this Gleditsia in dry, damp or wet soil, with a neutral to acidic pH value. A position in the sun is preferable.

Types of planting

Tree types

standard trees

Use

Location

street avenue square car park / parking lot park central reservation large garden cemetery traffic areas, industrial zones bioswale

Pavement

none

open

sealed

Planting concepts

eco planting prairie planting

Characteristics

Crown shape

egg-shaped

Crown structure

open

Height

6 - 12 m

Width

6 - 7 m

Winter hardiness zone

5A - 8B

Aspects

Wind

tolerant to 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

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Photos

Magnify

standard tree

leaves

bark

twigs

Seasonal colours

Gleditsia triacanthos 'Speczam' seizoenskleur

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Flowers

raceme discrete small scented

Flower colour

yellow-green

Flowering period

June - July

Leaves

Leaf colour

yellow buds yellow yellow-green

Leaves

deciduous ovoid crenate dentate pinnate bipinnate composite nitrogen fixing

Autumn colour

golden yellow

Fruits

no fruit

Bark

Bark colour

grey

Bark

slightly furrowed

Twigs

Twig colour

yellow-green

Twigs

thornless bare zigzagging vertical branches

Root system

deep shallow highly branched

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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Winter hardiness

A plant's winter hardiness is the coldest area in which it is frost-resistant. This is based on the average annual minimum temperature. Winter hardiness zones are thirteen different frost zones in steps of 5.5 degrees Celsius. This format is an international standard for the hardiness of plants. The zones in which the plant is frost-resistant are always included in the description of trees and other vegetation.

Winter hardiness is a genetic characteristic and is not influenced by the location in which the plant is cultivated. This means that a plant that has been cultivated for many years in winter-hardiness zone 6 but has a winter hardiness of 3 is perfectly suited for replanting in a colder zone. It will thrive there thanks to its genetic characteristics.

When choosing planting for a project, the winter hardiness of the plants is extremely important. By choosing species that match the zone in which the project is being created, it is possible to ensure that plants can withstand the minimum temperature in that area.

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