Acer palmatum 'Pendulum Julian' (Japanese maple 'Pendulum Julian')

Botanical name

Acer palmatum 'Pendulum Julian'

Other names

Japanese maple 'Pendulum Julian', Acer palmatum (Dissectum Group) 'Pendulum Julian', Acer palmatum var. dissectum 'Pendulum Julian'

Genus

Acer Acer

Variety or Cultivar

'Pendulum Julian' _ 'Pendulum Julian' is a mound-forming, deciduous shrub or small tree with pendent branches bearing deeply dissected, lobed, deep purple-red leaves turning green-flushed in summer and scarlet in autumn. Small, purple flowers in spring are followed by purple-red fruit in summer.

Native to

Garden origin

Foliage

Deciduous

Habit

Cushion or Mound Forming, Rounded

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Colour

Flower

Purple, Reddish-purple in Spring

Foliage

Reddish-purple in Spring; Reddish-purple, Purple, Flushed green in Summer; Scarlet in Autumn

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How to care

Watch out for

Specific pests

Horse chestnut scale , Aphids

Specific diseases

Verticillium wilt

General care

Pruning

Pruning group 1. Prune in late autumn to midwinter.

Propagation methods

Grafting, Softwood cuttings

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Monthly care advice

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Where to grow

Acer palmatum 'Pendulum Julian' (Japanese maple 'Pendulum Julian') will reach a height of 2.5m and a spread of 2.5m after 10-20 years.

Suggested uses

Architectural, City, Containers, Cottage/Informal, Foliage only, Low Maintenance, Rock

Cultivation

Grow in moist but well-drained, acid or neutral soil. Leaf colour is best in part shade but tolerates full sun. Leaf scorch can by caused by dry soil or excessive exposure to frost, sun, or wind when leaves are young.

Soil type

Chalky, Clay, Loamy, Sandy (will tolerate most soil types)

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Neutral

Light

Partial Shade, Full Sun

Aspect

South, East, West

Exposure

Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

USDA zones

Zone 8, Zone 7, Zone 6, Zone 5

Defra's Risk register #1

Plant name

Acer palmatum 'Pendulum Julian' (Japanese maple 'Pendulum Julian')

Common pest name

Apple root knot nematode

Scientific pest name

Meloidogyne mali

Type

Nematode

Current status in UK

Unknown

Likelihood to spread to UK (1 is very low - 5 is very high)

3

Impact (1 is very low - 5 is very high)

4

General biosecurity comments

UK (along with certain other European countries) received potentially infested trees in 1992; but these were destroyed at the end of the trial period and targeted surveillance has failed to find any trace of the nematode. Main impacts are on elm; apple and mulberry and industry should source such material carefully.

Defra's Risk register #2

Plant name

Acer palmatum 'Pendulum Julian' (Japanese maple 'Pendulum Julian')

Common pest name

Alfalfa dwarf; Anaheim disease; California vine disease; Dwarf disease of alfalfa; Dwarf disease of lucerne; Leaf scald of oleander; Leaf scald of plum; Leaf scorch; Phony disease of peach; Pierce's disease of grapevine; Variegated chlorosis of citrus

Scientific pest name

Xylella fastidiosa subsp. multiplex

Type

Bacterium

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

3

Impact (1 is very low - 5 is very high)

4

General biosecurity comments

A bacterial disease with a wide host range detected in Corsica. Although EU regulated; there remains some concern about the risk of introduction. This subspecies is known to be able to thrive in cooler climates. Should an outbreak occur; there would be a need for eradication action which would result in environmental and social impacts.

Defra's Risk register #3

Plant name

Acer palmatum 'Pendulum Julian' (Japanese maple 'Pendulum Julian')

Common pest name

Asian longhorn beetle; Starry sky beetle

Scientific pest name

Anoplophora glabripennis

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

4

General biosecurity comments

Recognised threat to a wide range of deciduous tress native to the UK. Already regulated it is a priority for continued surveillance and statutory action. The risk of entry is further mitigated by EU legislation requiring the monitoring of wooden packaging material originating from China.

About this section

Our plants are under greater threat than ever before. There is increasing movement of plants and other material traded from an increasing variety of sources. This increases the chances of exotic pests arriving with imported goods and travellers, as well as by natural means. Shoot is working with Defra to help members to do their part in preventing the introduction and spread of invasive risks.

Traveling or importing plants? Please read "Don't risk it" advice here

Suspected outbreak? Click here for contact details to report to the relevant authority.

Date updated: 7^th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/