Hydrangea quercifolia (Oak-leaved hydrangea)

Botanical name

Hydrangea quercifolia

Other names

Oak-leaved hydrangea, Oak leaf hydrangea, Oakleaf hydrangea

Genus

Hydrangea Hydrangea

Species

H. quercifolia - H. quercifolia is a deciduous shrub with large, deeply lobed leaves which are flushed red and purple in autumn and large cream florets in summer and autumn.

Foliage

Deciduous

Habit

Bushy

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; White in Autumn

Foliage

Dark-green in Summer; Bronze, Purple in Autumn

How to care

Watch out for

Specific pests

Capsid bug , Glasshouse red spider mite , Hydrangea scale

Diseases

Generally Disease Free

General care

Propagation methods

Softwood cuttings

Monthly care advice

Where to grow

Hydrangea quercifolia (Oak-leaved hydrangea) will reach a height of 1.5m and a spread of 2.5m after 5-10 years.

Suggested uses

City, Cottage/Informal, Flower Arranging, Beds and borders, Low Maintenance, Containers

Cultivation

Plant in moist, but well-drained, soil in sun or partial shade.

Soil type

Clay, Loamy, Sandy

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, 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), Tender in frost (H3)

USDA zones

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

Defra's Risk register #1

Plant name

Hydrangea quercifolia (Oak-leaved 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 quercifolia (Oak-leaved 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/