Liquidambar styraciflua 'Parasol'

Sweetgum Parasol

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Description

Liquidambar styraciflua ‘Parasol’ (Sweet gum Parasol) was found in the Dutch town of Bussum and released around 1985 by De Dorschkamp: the former Dutch National Institute for Forestry and Landscape. The parasol sweet gum remains a bit smaller than the species, with a height of between six and eight metres and a broadly flattened oval crown form up to six metres wide.

The dense crown of Liquidambar styraciflua ‘Parasol’ is created chiefly by the many forking branches the tree develops. A lot of cork is formed on the branches and twigs, whilst the bark of the trunk is smooth. The palmate, lobed leaf emerges bright green, retains its colour into the summer and only changes yellow-orange to brown-red in late autumn. At the end of April or early May the tree bears unremarkable yellow-green flower spikes. Hardly any fruits are produced after flowering.

Low-grafted, Liquidambar styraciflua ‘Parasol’ forms a small multi-stem but by grafting the selection on a stem of Liquidambar styraciflua a parasol-shaped crown is formed. These growth forms make the parasol sweet gum especially good for use in parks, green open spaces and (small) gardens. Liquidambar styraciflua ‘Parasol’ requires a bright, sheltered site on account of its fragile, easily breakable branches.

Types of planting

Tree types

standard trees shade trees

Use

Location

square car park / parking lot park central reservation large garden small garden cemetery

Pavement

none

open

sealed

Characteristics

Crown shape

flattened spherical

wide oval

Crown structure

dense

Height

6 - 8 m

Width

3 - 6 m

Winter hardiness zone

5B - 10B

Aspects

Wind

intolerant to wind

Soil

loess sabulous clay peaty light clay sand loamy soil

Nutrient level

moderately rich in nutrients rich in nutrients

Soil moisture level

moist wet

Light requirements

sun

pH range

acidic neutral

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Photos

Magnify

standard tree

bark

leaves

Flowers

spikes discrete

Flower colour

yellow-green

Flowering period

April - May

Leaves

Leaf colour

bright green

Leaves

deciduous palmate polished serrate lobate

Autumn colour

yellow-orange red-brown

Fruits

no fruit

Bark

Bark colour

grey

Bark

smooth, later on rough

Twigs

Twig colour

red-brown

Twigs

corky finely branched

Root system

deep extensive fleshy roots central root

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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