Citrus medica (Citron)

Botanical name

Citrus medica

Other names

Citron, Buddha's hand, Fingered citron, Sweet lime, Bush ukan, Cheu yuan, Citron oil plant, Cedrat

Genus

Citrus Citrus

Species

C. medica - C. medica is an evergreen shrub with spiny stems and dark-green ovate leaves. During spring to autumn, it bears clusters of fragrant, white flowers, followed by lenmon-like fruits.

Foliage

Evergreen

Fragrance

Flowers fragrant in spring and lemons have a citrus scent.

Habit

Upright, Rounded to broadly spreading

Colour

Flower

White in Spring; White in Summer; White in Autumn

Foliage

Dark-green in All seasons

How to care

Watch out for

Specific pests

Aphids , Caterpillars , Fruit tree red spider mite , Glasshouse red spider mite , Mealybugs , Scale insects

General care

Pruning

Thin fruit as required.

Propagation methods

Semi-hardwood cuttings

Monthly care advice

Where to grow

Citrus medica (Citron) will reach a height of 4m and a spread of 2.5m after 10-20 years.

Suggested uses

Add to salads, Architectural, Cake decoration, City, Conservatory, Containers, Cottage/Informal, Flavouring food and drinks, Indoor, Mediterranean

Cultivation

Plant outdoors in full sun in frost-free areas with a well-drained, neutral or acidic soil. Or plant inside in loam-based potting compost in full light.

Soil type

Clay, Loamy, Sandy

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, 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 9

Defra's Risk register #1

Plant name

Citrus medica (Citron)

Common pest name

Scientific pest name

Prodiplosis longifila

Type

Insect

Current status in UK

Absent

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

3

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

5

General biosecurity comments

Polyphagous gall midge present in the Americas; where it causes damage to outdoor and glasshouse crops. Europe-wide PRA will consider its potential to establish and cause damage.

Defra's Risk register #2

Plant name

Citrus medica (Citron)

Common pest name

Alfalfa dwarf; Anaheim disease; California vine disease; Dwarf disease of alfalfa; Dwarf disease of lucerne; Leaf scald of oleander; Leaf scald of plum; Leaf scorch; Phony disease of peach; Pierce's disease of grapevine; Variegated chlorosis of citrus

Scientific pest name

Xylella fastidiosa subsp. multiplex

Type

Bacterium

Current status in UK

Absent

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

3

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

4

General biosecurity comments

A bacterial disease with a wide host range detected in Corsica. Although EU regulated; there remains some concern about the risk of introduction. This subspecies is known to be able to thrive in cooler climates. Should an outbreak occur; there would be a need for eradication action which would result in environmental and social impacts.

Defra's Risk register #3

Plant name

Citrus medica (Citron)

Common pest name

Alfalfa dwarf; Anaheim disease; California vine disease; Dwarf disease of alfalfa; Dwarf disease of lucerne; Leaf scald of oleander; Leaf scald of plum; Leaf scorch; Phony disease of peach; Pierce's disease of grapevine; Variegated chlorosis of citrus

Scientific pest name

Xylella fastidiosa (all other strains and subspecies)

Type

Bacterium

Current status in UK

Absent

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

3

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

4

General biosecurity comments

A bacterial disease with a wide host range and many sub-species and strains; including those that could thrive in cooler climates; showing different levels of pathogenicity. Although EU regulated; there is some concern about the risk of introduction. Should an outbreak occur; there would be a need for eradication action which would result in environmental and social impacts.

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/