Hydrangea petiolaris (Climbing hydrangea)

Botanical name

Hydrangea petiolaris

Other names

Climbing hydrangea

Genus

Hydrangea Hydrangea

Species

H. petiolaris - H. petiolaris is a climbing, self-clinging deciduous perennial forming white lacecap-style hydrangea flowers in summer. Ideal for a shady north wall.

Foliage

Deciduous

Fragrance

The flowers have a lovely perfume, particularly in the evening.

Habit

Climbing, Twining

Awards

RHS AGM (Award of Garden Merit)

Colour

Flower

White in Summer

Foliage

Green in Summer; Yellow in Autumn

General care

Propagation methods

Semi-hardwood cuttings

Monthly care advice

Where to grow

Hydrangea petiolaris (Climbing hydrangea) will reach a height of 12m and a spread of 4m after 10-20 years.

Suggested uses

City, Containers, Wallside and trellises

Cultivation

A vigorous plant that needs a lot of space. It is best grown against a large tree or wall for the plant to attach to. Soil should be moist but well-drained with plenty of organic matter added.

Soil type

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

Soil drainage

Well-drained, 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 5, Zone 4, Zone 3

Defra's Risk register #1

Plant name

Hydrangea 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 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/