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Helianthus annuus 'Red Sun' (Sunflower 'Red Sun')

Beginner
skill rating
1 hour care
per year
2m
Max height
0.5m
Max spread
1 year
To maturity

Plant details

Botanical name

Helianthus annuus 'Red Sun'

Other names

Sunflower 'Red Sun'

Genus

Helianthus Helianthus

Variety or Cultivar

'Red Sun' _ 'Red Sun' is an erect, robust annual with oval to heart-shaped, toothed, hairy, dark green leaves and, in summer, large, dark red flowers with dark brown centres.


Helianthus annuus 'Red Sun' is: Deciduous

Habit

Erect

Flower

Dark-red in Summer

Foliage

Dark-green in Spring; Dark-green in Summer; Dark-green in Autumn

How to care

Watch out for

Specific pests

Slugs , Snails Slugs , Snails

Powdery mildew , Sclerotinia diseases Powdery mildew , Sclerotinia diseases

General care

Pruning

Cut back after flowering. Remove annual at the end of the growing season.

Propagation

Sow seed in-situ or in pots in spring.

Propagation methods

Seed


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Where to grow

Helianthus annuus 'Red Sun' (Sunflower 'Red Sun') will reach a height of 2m and a spread of 0.5m after 1 year.

Suggested uses

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

Cultivation

Sow seed in spring in moderately fertile, moist but well-drained, neutral to alkaline soil in full sun. Requires long, hot summers to flower well. Alternatively, sow in late winter with heat.

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, 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

Helianthus annuus 'Red Sun'

Other names

Sunflower 'Red Sun'

Genus

Helianthus Helianthus

Variety or Cultivar

'Red Sun' _ 'Red Sun' is an erect, robust annual with oval to heart-shaped, toothed, hairy, dark green leaves and, in summer, large, dark red flowers with dark brown centres.

Foliage

Deciduous

Habit

Erect


Colour

Flower

Dark-red in Summer

Foliage

Dark-green in Spring; Dark-green in Summer; Dark-green in Autumn


How to care

Watch out for

Specific pests

Slugs , Snails

Specific diseases

Powdery mildew , Sclerotinia diseases

General care

Pruning

Cut back after flowering. Remove annual at the end of the growing season.

Propagation

Sow seed in-situ or in pots in spring.

Propagation methods

Seed


Monthly care advice


Where to grow

Helianthus annuus 'Red Sun' (Sunflower 'Red Sun') will reach a height of 2m and a spread of 0.5m after 1 year.

Suggested uses

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

Cultivation

Sow seed in spring in moderately fertile, moist but well-drained, neutral to alkaline soil in full sun. Requires long, hot summers to flower well. Alternatively, sow in late winter with heat.

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, 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, Zone 5

Defra's Risk register #1

Plant name

Helianthus annuus 'Red Sun' (Sunflower 'Red Sun')

Common pest name

African cottom leafworm; Cotton leafworm; Egyptian cotton leafworm; Egyptian cotton worm; Mediterranean climbing cutworm; Meditteranea Brocade; Tobacco cutworm

Scientific pest name

Spodoptera littoralis

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; frequently intercepted with occasional outbreaks which have been successfully eradicated in the UK.

Defra's Risk register #2

Plant name

Helianthus annuus 'Red Sun' (Sunflower 'Red Sun')

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: 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, West Tell us...
Exposure: Exposed, Sheltered Tell us...
Hardiness: Hardy (H4) Tell us...

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