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Syringa vulgaris 'Congo' (Lilac 'Congo')

Beginner
skill rating
1 hour care
per year
3m
Max height
3m
Max spread
10-20 years
To maturity

Plant details

Botanical name

Syringa vulgaris 'Congo'

Other names

Lilac 'Congo'

Genus

Syringa Syringa

Variety or Cultivar

'Congo' _ 'Congo' is an upright, bushy, deciduous shrub or small tree with heart-shaped, mid-green leaves and dense panicles of fragrant, reddish-purple flowers in late spring and early summer.


Syringa vulgaris 'Congo' is: Deciduous

Fragrance

Flowers are strongly fragrant.

Habit

Upright, Bushy

Flower

Reddish-purple in Spring; Reddish-purple in Summer

Foliage

Mid-green in Spring; Mid-green in Summer; Yellow-brown in Autumn

How to care

Watch out for

Specific pests

Leaf mining moths , Thrips Leaf mining moths , Thrips

Lilac blight Lilac blight

General care

Pruning

Pruning group 1. Tolerates hard renovation pruning. Deadhead newly planted shrubs before seeds develop.

Propagation methods

Budding, Grafting, Layering, Softwood cuttings


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Where to grow

Syringa vulgaris 'Congo' (Lilac 'Congo') will reach a height of 3m and a spread of 3m after 10-20 years.

Suggested uses

City, Cottage/Informal, Hedging/Screens, Low Maintenance

Cultivation

Grow in fertile, moist but well-drained, neutral to alkaline soil in full sun. Mulch regularly.

Soil type

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

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Alkaline, Neutral

Light

Full Sun

Aspect

South, East, West

Exposure

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

Syringa vulgaris 'Congo'

Other names

Lilac 'Congo'

Genus

Syringa Syringa

Variety or Cultivar

'Congo' _ 'Congo' is an upright, bushy, deciduous shrub or small tree with heart-shaped, mid-green leaves and dense panicles of fragrant, reddish-purple flowers in late spring and early summer.

Foliage

Deciduous

Fragrance

Flowers are strongly fragrant.

Habit

Upright, Bushy


Colour

Flower

Reddish-purple in Spring; Reddish-purple in Summer

Foliage

Mid-green in Spring; Mid-green in Summer; Yellow-brown in Autumn


How to care

Watch out for

Specific pests

Leaf mining moths , Thrips

Specific diseases

Lilac blight

General care

Pruning

Pruning group 1. Tolerates hard renovation pruning. Deadhead newly planted shrubs before seeds develop.

Propagation methods

Budding, Grafting, Layering, Softwood cuttings


Monthly care advice


Where to grow

Syringa vulgaris 'Congo' (Lilac 'Congo') will reach a height of 3m and a spread of 3m after 10-20 years.

Suggested uses

City, Cottage/Informal, Hedging/Screens, Low Maintenance

Cultivation

Grow in fertile, moist but well-drained, neutral to alkaline soil in full sun. Mulch regularly.

Soil type

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

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Alkaline, Neutral

Light

Full Sun

Aspect

South, East, West

Exposure

Sheltered

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

Hardy (H4)

USDA zones

Zone 7, Zone 6, Zone 5, Zone 4

Defra's Risk register #1

Plant name

Syringa vulgaris 'Congo' (Lilac 'Congo')

Common pest name

Ash yellows

Scientific pest name

Candidatus Phytoplasma fraxini

Type

Phytoplasma

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

Pathogen causing phytoplasma disease of certain tree species in the Americas. EU regulation already provides some mitigation against the risk of introduction; but could be further strengthened.

Defra's Risk register #2

Plant name

Syringa vulgaris 'Congo' (Lilac 'Congo')

Common pest name

Japanese long scale; Japanese maple scale; Long scale; Japanese; Pear white scale

Scientific pest name

Lopholeucaspis japonica

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

Regulated only on Citrus at present; regulation on other hosts needs to be considered. Only likely to be a pest under glass in UK.

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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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: Alkaline, Neutral Tell us...
Light: Full Sun Tell us...
Aspect: South, East, West Tell us...
Exposure: Sheltered Tell us...
Hardiness: Hardy (H4) Tell us...

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