Hydrangea anomala subsp. petiolaris (Climbing hydrangea)

Botanical name

Hydrangea anomala subsp. petiolaris

Other names

Climbing hydrangea, Hydrangea petiolaris

Genus

Hydrangea Hydrangea

Species

H. anomala subsp. petiolaris - H. anomala subsp. petiolaris is a deciduous shrub usually grown as a self-clinging climber, but also suitable for cultivation as a stand alone shrub. It has fresh-green, serrated, ovate leaves and in early summer, bears large, pretty, white lace-cap flowers. It is a useful climber for North-facing walls and fences.

Foliage

Deciduous

Habit

Climbing

Toxicity

Can cause mild stomach upset if ingested and contact with foliage may aggravate skin allergies.

Awards

RHS AGM (Award of Garden Merit)

Colour

Flower

White in Summer

Foliage

Green in Spring; Green in Summer; Green in Autumn

General care

Propagation methods

Layering, Semi-ripe cuttings

Monthly care advice

Where to grow

Hydrangea anomala subsp. petiolaris (Climbing hydrangea) will reach a height of 15m and a spread of 5m after 5-10 years.

Suggested uses

Beds and borders, City, Cottage/Informal, Low Maintenance, Wallside and trellises

Cultivation

Plant in humus-rich, moist, free-draining soil in sun or shade. If grown as a climber, provide support until established. Mulch and feed in spring.

Soil type

Clay, Loamy, Sandy

Soil drainage

Moist but well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Sun

Aspect

North, South, East, West

Exposure

Exposed, Sheltered

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

Hardy (H4)

USDA zones

Zone 9, Zone 8, Zone 7, Zone 6, Zone 5, Zone 4

Defra's Risk register #1

Plant name

Hydrangea anomala subsp. petiolaris (Climbing hydrangea)

Common pest name

assam thrips; castor thrips; chilli thrips; yellow tea thrips

Scientific pest name

Scirtothrips dorsalis

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

EU listed pest for citrus but highly polyphagous and intercepted on a number of hosts. EU legislation should be updated to reflect wider host list.

Defra's Risk register #2

Plant name

Hydrangea anomala subsp. petiolaris (Climbing hydrangea)

Common pest name

Rice leaf nematode; Strawberry crimp disease nematode; White tip nematode; White tip nematode of rice

Scientific pest name

Aphelenchoides besseyi

Type

Nematode

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)

3

General biosecurity comments

Damaging nematode affecting rice crops and strawberry production in warmer climates; could potentially present a threat to strawberry production and ornamental production in protected environments. But modern production practices seem to reduce likelihood of impacts. Pest is also regulated at EU level; which reduces likelihood of entry.

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/