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Annual Biennial
Size
Ultimate height
1–1.5 metresTime to ultimate height
1–2 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Chalk
Clay
Loam
Moisture
Moist but well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green Grey Silver | |||
|---|---|---|---|---|
| Summer | Yellow | Green Grey Silver | ||
| Autumn | Yellow | Green Grey Silver | ||
| Winter |
Position
- Full sun
Aspect
East–facing or South–facing or West–facing
Exposure
Sheltered Hardiness
H2Botanical details
- Family
- Asteraceae
- Native to GB / Ireland
- No
- Foliage
- Deciduous
- Habit
- Bushy, Clump forming
- Genus
Helianthus can be tall, erect annuals, tuberous or rhizomatous perennials, with coarse simple leaves and large daisy-like flower-heads
- Name status
Correct
- Plant range
- USA
How to grow
Cultivation
Grow in moderately fertile, neutral to alkaline, humus-rich, moist but well-drained soil in full sun
Propagation
Propagate by seed in spring or division in autumn. Divide every three years to maintain vigour. See propagate by seed (sown indoors) or
Suggested planting locations and garden types
- Cottage and informal garden
- City and courtyard gardens
- Wildlife gardens
- Flower borders and beds
Pruning
Cut back to the ground in autumn or leave for birds to eat the seeds
Pests
Diseases
May be susceptible to powdery mildews and sclerotinia diseases
Get involved
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