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Giant Sunflower in the GardenTags plant encyclopedia

Helianthus

 

Giant Sunflower

Sunflowers are stunning annuals or perennials which vary in height, flower size and colour. Well known as being easy to grow, where there is room for them, they make a bold and impressive display.

Contributed by @emmajane

 
plant Features
  • Giant Sunflower likes full sun

    Full sun

  • Giant Sunflower likes occasional watering

    Occasional watering

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

    A little frost hardy: 32F (0°C)

  • Giant 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

Giant Sunflower

Latin name

Helianthus

type

Flowering plant

family

Asteraceae

ph

5.0 - 7.0 Acid - Neutral

  • Light

    Giant Sunflower likes full sun

    Full sun

  • Frost

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

    A little frost hardy: 32F (0°C)

  • Soil

    Giant Sunflower likes moist and free draining

    Moist and free draining

  • Water

    Giant 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 Giant Sunflower is 0.50meters x 4.00meters 0.50 M 4.00 M

Helianthus

Sunflowers are stunning annuals or perennials which vary in height, flower size and colour. Well known as being easy to grow, where there is room for them, they make a bold and impressive display.


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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Gardeners who are growing this plant