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Sunflower in the GardenTags plant encyclopedia

Helianthus annuus

 

Sunflower

Helianthus is a group of annual and perennial flowering plants, which are members of the Asteraceae family. Most originate from North or Central America. They can be tall or short, and can be either annuals, tuberous or rhizomatous perennials. They typically have coarse leaves and usually have large daisy like flowers. Helianthus annuus is the common sunflower, and is a species Helianthus native to North America. It is grown as an annual plant, meaning it grows from seed, produces flowers and sets seed all in one growing season. After this, it would usually dies. Helianthus annuus typically grows during the summer and into early fall, with the peak growth season being mid-summer. Many cultivars are now available, of varying colours and heights, but are usually either yellow, brown, orange or white, and have dark brown centres where new seeds develop.

Contributed by @emmajane

 
plant Features
  • Sunflower likes full sun

    Full sun

  • Sunflower likes occasional watering

    Occasional watering

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

    A little frost hardy: 32F (0°C)

  • Sunflower likes moist and free draining

    Moist and free draining

 
Similar plants are available to buy from 3 store(s) in the UK
 
plant information

Common name

Sunflower

Latin name

Helianthus annuus

type

Annual

family

Asteraceae

ph

5.0 - 7.0 Acid - Neutral

  • Light

    Sunflower likes full sun

    Full sun

  • Frost

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

    A little frost hardy: 32F (0°C)

  • Soil

    Sunflower likes moist and free draining

    Moist and free draining

  • Water

    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 Sunflower is 0.50meters x 4.00meters 0.50 M 4.00 M

Helianthus annuus

Helianthus is a group of annual and perennial flowering plants, which are members of the Asteraceae family. Most originate from North or Central America. They can be tall or short, and can be either annuals, tuberous or rhizomatous perennials. They typically have coarse leaves and usually have large daisy like flowers. Helianthus annuus is the common sunflower, and is a species Helianthus native to North America. It is grown as an annual plant, meaning it grows from seed, produces flowers and sets seed all in one growing season. After this, it would usually dies. Helianthus annuus typically grows during the summer and into early fall, with the peak growth season being mid-summer. Many cultivars are now available, of varying colours and heights, but are usually either yellow, brown, orange or white, and have dark brown centres where new seeds develop.


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.

 

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.

 

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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