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Alcea rosea 'Nigra' (Hollyhock 'Nigra')

Beginner
skill rating
1 hour care
per year
2m
Max height
0.75m
Max spread
2-5 years
To maturity

Plant details

Botanical name

Alcea rosea 'Nigra'

Other names

Hollyhock 'Nigra'

Genus

Alcea Alcea

Variety or Cultivar

'Nigra' _ 'Nigra' is an upright biennial or short-lived perennial with rounded, lobed, rough, mid- to dark green leaves and long, terminal racemes of large, dark maroon flowers in summer.


Alcea rosea 'Nigra' is: Deciduous

Habit

Clump-forming, Erect

Flower

Yellow, Dark-brown, Dark-purple in Summer

Foliage

Dark-green in Summer

How to care

Watch out for

Specific pests

Capsid bug , Caterpillars , Flea beetles , Slugs Capsid bug , Caterpillars , Flea beetles , Slugs

Diseases

Susceptible to a rust.

General care

Pruning

Cut back after flowering.

Propagation methods

Seed


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Where to grow

Alcea rosea 'Nigra' (Hollyhock 'Nigra') will reach a height of 2m and a spread of 0.75m after 2-5 years.

Suggested uses

Coastal, Cottage/Informal, Beds and borders, Wallside and trellises

Cultivation

Grow in well-drained, moderately fertile soil in full sun. Staking advised (particularly in windy locations).

Soil type

Chalky, Loamy, Sandy

Soil drainage

Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Full Sun

Aspect

South, 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

Alcea rosea 'Nigra'

Other names

Hollyhock 'Nigra'

Genus

Alcea Alcea

Variety or Cultivar

'Nigra' _ 'Nigra' is an upright biennial or short-lived perennial with rounded, lobed, rough, mid- to dark green leaves and long, terminal racemes of large, dark maroon flowers in summer.

Foliage

Deciduous

Habit

Clump-forming, Erect


Colour

Flower

Yellow, Dark-brown, Dark-purple in Summer

Foliage

Dark-green in Summer


How to care

Watch out for

Specific pests

Capsid bug , Caterpillars , Flea beetles , Slugs

Diseases

Susceptible to a rust.

General care

Pruning

Cut back after flowering.

Propagation methods

Seed


Monthly care advice


Where to grow

Alcea rosea 'Nigra' (Hollyhock 'Nigra') will reach a height of 2m and a spread of 0.75m after 2-5 years.

Suggested uses

Coastal, Cottage/Informal, Beds and borders, Wallside and trellises

Cultivation

Grow in well-drained, moderately fertile soil in full sun. Staking advised (particularly in windy locations).

Soil type

Chalky, Loamy, Sandy

Soil drainage

Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Full Sun

Aspect

South, West

Exposure

Exposed, Sheltered

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

Hardy (H4)

USDA zones

Zone 10, Zone 9, Zone 8, Zone 7, Zone 6, Zone 5, Zone 4, Zone 3

Defra's Risk register #1

Plant name

Alcea rosea 'Nigra' (Hollyhock 'Nigra')

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 #2

Plant name

Alcea rosea 'Nigra' (Hollyhock 'Nigra')

Common pest name

cotton mealybug

Scientific pest name

Phenacoccus solenopsis

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)

3

General biosecurity comments

Watching brief for potential impact on tomato production in the Mediterranean. Other southern European countries likely to be more at risk. Precautionary action will be taken on findings on planting material to protect glasshouse crops and botanical gardens.

Defra's Risk register #3

Plant name

Alcea rosea 'Nigra' (Hollyhock 'Nigra')

Common pest name

Scientific pest name

Spilostethus hospes

Type

Insect

Current status in UK

Absent

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

1

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

3

General biosecurity comments

Seed bug unlikely to pose a significant threat to UK plant health.

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, Loamy, Sandy Tell us...
Soil drainage: Well-drained Tell us...
Soil pH: Acid, Alkaline, Neutral Tell us...
Light: Full Sun Tell us...
Aspect: South, West Tell us...
Exposure: Exposed, Sheltered Tell us...
Hardiness: Hardy (H4) Tell us...

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