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Zelkova serrata 'Flekova'

Zelkova serrata 'Flekova'

Flekova Japanese Zelkova

synonym Zelkova serrata 'GREEN VASE'

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Description

Zelkova serrata ‘Flekova’ (synonym Zelkova serrata ‘GREEN VASE’) was selected in 1983 and introduced by Princeton Nurseries of New Jersey, USA. The selection is narrower and considerably taller than the other selections of Zelkova serrata, in its juvenile state grows twice as fast as ‘Village Green’ and retains a slightly narrower shape thanks to the erect branching. However, as the tree matures it can actually get between ten and twelve metres wide, and up to fifteen to twenty metres tall. Siting in narrower spaces - despite the low branching crown - is often not a problem given that the top is the widest part. 

The large, bright green summer foliage of Zelkova serrata ‘Flekova’ takes on magnificent autumn hues, ranging from golden yellow to vivid orange.
The leaf is similar to that of the species: egg-shaped to ovate, with a pointed top and toothed leaf edge. The juvenile grey bark covered in lenticels is smooth and peels off in flat platelets in maturity, revealing a lovely, orange brown under bark in the process.

Because of its great resemblance to an elm, albeit with a more compact habit, Zelkova serrata ‘Flekova’ makes the ideal substitute. Its narrow vase-shaped appearance means it is much more suited to planting along broad streets and avenues for example than the species which is often too wide. Cultivar ‘Flekova’ also makes an excellent choice for large gardens, parks and on squares.  The healthy tree is appreciated for its excellent hardiness and resistance to Dutch elm disease and it also tolerates urban air, wind, coastal wind and paved areas very well. The selection tolerates a wide range of soils but prefers nutrient-rich, moist and chalky soils. Prune Zelkova serrata ‘Flekova’ whilst still young in order to thin out any overcrowded branches to allow them sufficient space as they mature.

Types of planting

Tree types

standard trees multi-stemmed trees shade trees

Topiary on stem

fval candelabra fval vase

Use

Location

street avenue square car park / parking lot park central reservation in containers roof garden large garden cemetery traffic areas, industrial zones coastal area

Pavement

none none open open sealed sealed

Characteristics

Crown shape

vase-shaped vase-shaped narrow vase-shaped narrow vase-shaped

Crown structure

semi-open semi-open

Height

15 - 20 m

Width

10 - 12 m

Winter hardiness zone

5A - 8B

Aspects

Wind

tolerant to wind 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

moist

Light requirements

sun partial shade

pH range

acidic neutral alkaline

Extreme environments

tolerates air pollution

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Order this plant? Or would you like further information about Zelkova serrata 'Flekova'? Make an appointment for a detailed planting recommendation.
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Photos

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high-stem standard tree
Zelkova serrata 'Flekova' standard tree
high-stem standard tree
Zelkova serrata 'Flekova' standard tree
high-stem standard tree
Zelkova serrata 'Flekova' standard tree
high-stem standard tree
Zelkova serrata 'Flekova' standard tree
high-stem standard tree
Zelkova serrata 'Flekova' standard tree
high-stem standard tree
Zelkova serrata 'Flekova' standard tree
high-stem standard tree
Zelkova serrata 'Flekova' standard tree
high-stem standard tree
Zelkova serrata 'Flekova' standard tree
high-stem standard tree
Zelkova serrata 'Flekova' standard tree
high-stem standard tree
Zelkova serrata 'Flekova' standard tree
high-stem standard tree
Zelkova serrata 'Flekova' standard tree
high-stem standard tree
Zelkova serrata 'Flekova' standard tree
high-stem standard tree
Zelkova serrata 'Flekova' standard tree
high-stem standard tree
Zelkova serrata 'Flekova' standard tree
high-stem standard tree
Zelkova serrata 'Flekova' standard tree
feathered feathered
Zelkova serrata 'Flekova' feathered
multi-stem-umbrella multi-stem umbrella
Zelkova serrata 'Flekova' multi-stem umbrella
multi-stem-umbrella multi-stem umbrella
Zelkova serrata 'Flekova' multi-stem umbrella
multi-stem-umbrella multi-stem umbrella
Zelkova serrata 'Flekova' multi-stem umbrella
multi-stem-umbrella multi-stem umbrella
Zelkova serrata 'Flekova' multi-stem umbrella
multi-stem-umbrella multi-stem umbrella
Zelkova serrata 'Flekova' multi-stem umbrella
multi-stem-umbrella multi-stem umbrella
Zelkova serrata 'Flekova' multi-stem umbrella
multi-stem-umbrella multi-stem umbrella
Zelkova serrata 'Flekova' multi-stem umbrella
multi-stem-umbrella multi-stem umbrella
Zelkova serrata 'Flekova' multi-stem umbrella
leaves leaves
Zelkova serrata 'Flekova' leaves
leaves leaves
Zelkova serrata 'Flekova' leaves
leaves leaves
Zelkova serrata 'Flekova' leaves
leaves leaves
Zelkova serrata 'Flekova' leaves

Flowers

Flowers

heads discrete

Flower colour

green

Flowering period

April

Leaves

Leaf colour

bright green

Leaves

deciduous ovate lanceolate serrate dentate

Autumn colour

golden yellow yellow-orange orange orange-red

Fruits

Fruit colour

brown

Fruits

discrete drupe

Bark

Bark colour

orange grey

Bark

peeling smooth, later on rough

Twigs

Twig colour

brown

Twigs

with lenticels vertical branches finely branched long shoots

Root system

Root system

deep extensive tap 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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