Dahlia 'Bishop of Llandaff' (Dahlia 'Bishop of Llandaff')

Botanical name

Dahlia 'Bishop of Llandaff'

Other names

Dahlia 'Bishop of Llandaff'

Genus

Dahlia Dahlia

Variety or Cultivar

'Bishop of Llandaff' _ 'Bishop of Llandaff' is an herbaceous perennial, with dark-red foliage and semi-double brilliant red flowers.

Foliage

Deciduous

Habit

Clump-forming, Erect

Toxicity

All parts may cause severe discomfort if ingested and may irriitate skin.

Awards

Proven Winners, RHS AGM (Award of Garden Merit)

Colour

Flower

Red in Summer; Red in Autumn

Foliage

Dark-red, Dark-green, Black in Summer

How to care

Watch out for

Specific pests

Aphids , Capsid bug , Caterpillars , Earwigs , Glasshouse red spider mite

General care

Pruning

Deadhead to prolong flowering

Monthly care advice

Where to grow

Dahlia 'Bishop of Llandaff' (Dahlia 'Bishop of Llandaff') will reach a height of 1m and a spread of 0.5m after 1-2 years.

Suggested uses

City, Cottage/Informal, Flower Arranging, Beds and borders

Cultivation

Grow in a fertile, humus-rich well-drained soil in full sun.

Soil type

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

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Full Sun

Aspect

South, West

Exposure

Sheltered

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

Tender in frost (H3)

USDA zones

Zone 11, Zone 10, Zone 9

Defra's Risk register #1

Plant name

Dahlia 'Bishop of Llandaff' (Dahlia 'Bishop of Llandaff')

Common pest name

Corn borer; Corn moth; European corn borer; European maize borer; European stalk borer; Maize pyralid

Scientific pest name

Ostrinia nubilalis

Type

Insect

Current status in UK

Present (Limited)

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

3

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

3

General biosecurity comments

Polyphagous boring pest present in the UK since the 1930’s. A maize-affecting race was detected for the first time in 2010. Industry may wish to monitor for its presence and mitigate against impacts.

Defra's Risk register #2

Plant name

Dahlia 'Bishop of Llandaff' (Dahlia 'Bishop of Llandaff')

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.

Defra's Risk register #3

Plant name

Dahlia 'Bishop of Llandaff' (Dahlia 'Bishop of Llandaff')

Common pest name

American serpentine leaf miner; chrysanthemum leaf miner

Scientific pest name

Liriomyza trifolii

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)

3

General biosecurity comments

Regulated pest already subject to review at the EU level (2013). Regularly intercepted in the trade.

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/