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Helianthus x laetiflorus (Perennial sunflower)

Skill rating
Skill rating
Beginner
skill rating
Maintenance level
Maintenance level
1 hour care
per year
Ultimate height
Ultimate height
2m
Max height
Ultimate spread
Ultimate spread
1.2m
Max spread
Time to maturity
Time to maturity
1-2 years
To maturity

Plant details

Botanical name: Helianthus x laetiflorus

Other names: Perennial sunflower, Showy sunflower, Prairie sunflower, Rough-leaved sunflower, Stiff sunflower, Helianthus rigidus, Helianthus scaberrimus, Helianthus pauciflorus

Genus: Helianthus Helianthus

Species: H. x laetiflorus - H. x laetiflorus is a tall, spreading, bushy, rhizomatous perennial with rough, upright stems bearing narrowly-ovate, toothed, dark green leaves and bright yellow flower heads from late summer to mid-autumn.


Helianthus x laetiflorus is: Deciduous

Flower: Bright-yellow in Summer; Bright-yellow in Autumn

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

Habit: Bushy, Erect flower stem, Spreading, Tall

How to care

Watch out for

Specific pests: Slugs , Snails Slugs , Snails

Specific diseases: Powdery mildew , Sclerotinia diseases Powdery mildew , Sclerotinia diseases

General care

Pruning: Divide every 2-4 years to maintain vigour. Cut back after flowering.. REGISTER to read more...

Propagation methods: Division. REGISTER to read more...


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Where to grow

Helianthus x laetiflorus (Perennial sunflower) will reach a height of 2m and a spread of 1.2m after 1-2 years.

Suggested uses: Add to salads, Architectural, Beds and borders, Containers, Cottage/Informal, Flower Arranging, Wildflower

Cultivation: Grow in moist or moist but well-drained, neutral to alkaline soil in full sun. Suited for use near water. Needs long, hot summers to flower well. May need support. Mulch annually with garden compost or well-rotted manure. Site carefully as may be invasive

Soil type: Chalky, Clay, Loamy

Soil drainage: Moist but well-drained

Soil pH: Alkaline, Neutral

Light: Full Sun

Aspect: South, East, West

Exposure: Sheltered

Hardiness: Hardy (H4)


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Companion plants

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

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Coreopsis 'Sterntaler' (3 Plants)
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Achillea 'Rose Madder' (3 Plants)
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Botanical name: Helianthus x laetiflorus

Other names: Perennial sunflower, Showy sunflower, Prairie sunflower, Rough-leaved sunflower, Stiff sunflower, Helianthus rigidus, Helianthus scaberrimus, Helianthus pauciflorus

Genus: Helianthus Helianthus

Species: H. x laetiflorus - H. x laetiflorus is a tall, spreading, bushy, rhizomatous perennial with rough, upright stems bearing narrowly-ovate, toothed, dark green leaves and bright yellow flower heads from late summer to mid-autumn.


Helianthus x laetiflorus is: Deciduous

Flower: Bright-yellow in Summer; Bright-yellow in Autumn

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

Habit: Bushy, Erect flower stem, Spreading, Tall

Watch out for

Specific pests: Slugs , Snails

Specific diseases: Powdery mildew , Sclerotinia diseases

General care

Pruning: Divide every 2-4 years to maintain vigour. Cut back after flowering.. REGISTER to read more...

Propagation methods: Division. REGISTER to read more...


Sign up for your FREE ACCOUNT today or login to receive detailed monthly care instructions

Helianthus x laetiflorus (Perennial sunflower) will reach a height of 2m and a spread of 1.2m after 1-2 years.

Suggested uses: Add to salads, Architectural, Beds and borders, Containers, Cottage/Informal, Flower Arranging, Wildflower

Cultivation: Grow in moist or moist but well-drained, neutral to alkaline soil in full sun. Suited for use near water. Needs long, hot summers to flower well. May need support. Mulch annually with garden compost or well-rotted manure. Site carefully as may be invasive

Soil type: Chalky, Clay, Loamy

Soil drainage: Moist but well-drained

Soil pH: Alkaline, Neutral

Light: Full Sun

Aspect: South, East, West

Exposure: Sheltered

Hardiness: Hardy (H4)


Use My Plant Check to see if this plant is a good match for your garden

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

In order to add a note on this plant, please add this plant to your plant lists.

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Helianthus - how to stop the droop!

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YOU MIGHT LIKE...

Helianthus 'Lemon Queen'
£ 5.00
Penstemon 'Rubicunda' Agm (3 Plants)
£ 10.00
£12.00
Digitalis Mertonensis (3 Plants)
£ 10.00
£12.00
Helenium 'Moerheim Beauty' (3 Plants)
£ 10.00
£12.00
Coreopsis 'Sterntaler' (3 Plants)
£ 10.00
£10.50
Achillea 'Rose Madder' (3 Plants)
£ 10.00
£12.00

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