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Chaenomeles x superba 'Knap Hill Scarlet' (Japanese quince 'Knap Hill Scarlet')

Beginner
skill rating
1 hour care
per year
1.5m
Max height
2.5m
Max spread
10-20 years
To maturity

Plant details

Botanical name

Chaenomeles x superba 'Knap Hill Scarlet'

Other names

Japanese quince 'Knap Hill Scarlet'

Genus

Chaenomeles Chaenomeles

Variety or Cultivar

'Knap Hill Scarlet' _ 'Knap Hill Scarlet' is short, wide shrub, with glossy leaves and bright orange-scarlet flowers followed by yellow fragrant fruits.


Chaenomeles x superba 'Knap Hill Scarlet' is: Deciduous

Habit

Bushy, Spreading

Awards

RHS AGM (Award of Garden Merit)

Flower

Red, Orange in Spring

Foliage

Dark-green in Summer

How to care

Watch out for

Specific pests

Aphids , Brown scale Aphids , Brown scale

Fireblight Fireblight

General care

Propagation methods

Semi-hardwood cuttings


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Where to grow

Chaenomeles x superba 'Knap Hill Scarlet' (Japanese quince 'Knap Hill Scarlet') will reach a height of 1.5m and a spread of 2.5m after 10-20 years.

Suggested uses

Cottage/Informal, Low Maintenance, Wallside and trellises

Cultivation

Plant in well-drained soil in sun or partial shade.

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

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)

Companion plants

We do not currently have companion plants added for this plant.

Botanical name

Chaenomeles x superba 'Knap Hill Scarlet'

Other names

Japanese quince 'Knap Hill Scarlet'

Genus

Chaenomeles Chaenomeles

Variety or Cultivar

'Knap Hill Scarlet' _ 'Knap Hill Scarlet' is short, wide shrub, with glossy leaves and bright orange-scarlet flowers followed by yellow fragrant fruits.

Foliage

Deciduous

Habit

Bushy, Spreading

Awards

RHS AGM (Award of Garden Merit)


Colour

Flower

Red, Orange in Spring

Foliage

Dark-green in Summer


How to care

Watch out for

Specific pests

Aphids , Brown scale

Specific diseases

Fireblight

General care

Propagation methods

Semi-hardwood cuttings


Monthly care advice


Where to grow

Chaenomeles x superba 'Knap Hill Scarlet' (Japanese quince 'Knap Hill Scarlet') will reach a height of 1.5m and a spread of 2.5m after 10-20 years.

Suggested uses

Cottage/Informal, Low Maintenance, Wallside and trellises

Cultivation

Plant in well-drained soil in sun or partial shade.

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

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

Defra's Risk register #1

Plant name

Chaenomeles x superba 'Knap Hill Scarlet' (Japanese quince 'Knap Hill Scarlet')

Common pest name

grape ground pearl

Scientific pest name

Margarodes vitis

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)

5

General biosecurity comments

Main pathway; Vitis spp. plants for planting; already prohibited. However; further consideration of other pathways is required.

Defra's Risk register #2

Plant name

Chaenomeles x superba 'Knap Hill Scarlet' (Japanese quince 'Knap Hill Scarlet')

Common pest name

Lance nematode; Nematode; Lance

Scientific pest name

Hoplolaimus spp.

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)

4

General biosecurity comments

Nematode species potentially affecting a wide variety of crops; prohibition of soil likely to mitigate risk substantially; keep under review in light of interceptions or findings should they occur in the EU.

Defra's Risk register #3

Plant name

Chaenomeles x superba 'Knap Hill Scarlet' (Japanese quince 'Knap Hill Scarlet')

Common pest name

Cedar-Quince rust; Quince rust; Rust of apple; Rust of juniper; Rust of quince

Scientific pest name

Gymnosporangium clavipes

Type

Fungus

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 regulated rust disease which helps mitigate against introduction. A review of EU regulations will help to ensure that all hosts are regulated.

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

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2015

Photo taken 21st April 2013. (21/04/2013)

(21/04/2013)

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This plant likes... Garden match
Soil types: Chalky, Clay, Loamy, Sandy (will tolerate most soil types) Tell us...
Soil drainage: Moist but well-drained, Well-drained Tell us...
Soil pH: Acid, Alkaline, Neutral Tell us...
Light: Partial Shade, Full Sun Tell us...
Aspect: North, South, East, West Tell us...
Exposure: Exposed, Sheltered Tell us...
Hardiness: Hardy (H4) Tell us...

GARDENS WITH THIS PLANT

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Mrs V Johnston
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ARTICLES WITH THIS PLANT

Passing on a Cambridge garden

Tim Ewbank recently sold his Cambridgeshire home and garden. He decided at the same time to pass along his Shoot account to the new home owner so they could benefit from the information about their… read more


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