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Willowleaf sunflower in the GardenTags plant encyclopedia

Helianthus Salicifolius

 

Willowleaf sunflower

Helianthus salicifolius is a perennial which grows to 2.5m. tall, spreading by means of underground rhizomes. Leaves are long and very very narrow, up to 20cm long. Each plant usually produces 6-15 flower heads, each containing 10-20 yellow ray florets surrounding 50 or more red disc florets. Prefers average, well-drained soils. Grows best with added moisture but can tolerate drought. Allow seed heads to remain for winter food for birds and divide clumps in spring or autumn every 3 to 4 years.

Contributed by @twin-dragons

 
plant Features
  • Willowleaf sunflower likes full sun

    Full sun

  • Willowleaf sunflower likes occasional watering

    Occasional watering

  • Willowleaf sunflower is a little frost hardy: 32f (0°c)

    A little frost hardy: 32F (0°C)

  • Willowleaf sunflower likes moist and free draining

    Moist and free draining

 
Similar plants are available to buy from 2 store(s) in the UK
 
plant information

Common name

Willowleaf sunflower

Latin name

Helianthus Salicifolius

type

Flowering plant

family

Asteraceae

ph

5.0 - 7.0 Acid - Neutral

  • Light

    Willowleaf sunflower likes full sun

    Full sun

  • Frost

    Willowleaf sunflower is a little frost hardy: 32f (0°c)

    A little frost hardy: 32F (0°C)

  • Soil

    Willowleaf sunflower likes moist and free draining

    Moist and free draining

  • Water

    Willowleaf sunflower likes occasional watering

    Occasional watering

Plant & bloom calendar

  •  
    Best time to plant
  •  
    When the plant will bloom

full grown dimensions

The size of a fully grown Willowleaf sunflower is 0.90meters x 2.50meters 0.90 M 2.50 M

Helianthus Salicifolius

Helianthus salicifolius is a perennial which grows to 2.5m. tall, spreading by means of underground rhizomes. Leaves are long and very very narrow, up to 20cm long. Each plant usually produces 6-15 flower heads, each containing 10-20 yellow ray florets surrounding 50 or more red disc florets. Prefers average, well-drained soils. Grows best with added moisture but can tolerate drought. Allow seed heads to remain for winter food for birds and divide clumps in spring or autumn every 3 to 4 years.


Propagation by seed outdoors

From Mid Winter TO Early Spring

Once the frosts have passed it is time to plant sunflowers into the garden. If planting straight into the soil, look for a sunny position with shelter from winds. A position against a wall is usually best. Try to avoid sandy soil and rich-free draining soil will be most successful. Plant the seeds about 30cm apart and about 3cm below the surface. Sunflowers do like a lot of water so to get the best out of your plant try to water it every day, but keep and eye on the soil and roots as constantly damp and soggy roots will make the plant unstable and good lead to root rot.

 

Planting young plants

From Early Spring TO Early Spring

Plant pot grown plants or rhizomes in early spring, in moderately fertile, moist but well-drained, alkaline to neutral soil in full sun. These are tall plants with week stems prone to wind damage so may need support from canes or planting against a trellis.

 

Planting Outdoors Spring

From Early Spring TO Mid Spring

Once the frosts have passed it is time to plant sunflowers into the garden. If planting straight into the soil, look for a sunny position with shelter from winds. A position against a wall is usually best. Try to avoid sandy soil and rich-free draining soil will be most successful. Plant the seeds about 30cm apart and about 3cm below the surface. Sunflowers do like a lot of water so to get the best out of your plant try to water it every day, but keep and eye on the soil and roots as constantly damp and soggy roots will make the plant unstable and could lead to root rot.

 

Flowering season

From Early Summer TO Early Autumn

Sunflowers flower throughout the hottest part of the summer. Their flower heads famously follow the sun throughout the day and hang down over night! A stunning site throughout many regions of mid and southern France and Italy where they are farmed for the oil. Very bee friendly.

 
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Gardeners who are growing this plant