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Annual BiennialBedding
Size
Ultimate height
1–1.5 metresTime to ultimate height
1–2 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drainedpH
Alkaline, NeutralColour & scent
Stem | Flower | Foliage | Fruit | |
Spring | Green | |||
---|---|---|---|---|
Summer | Black Brown Red | Green | ||
Autumn | ||||
Winter |
Position
- Full sun
Aspect
South–facing or West–facing
Exposure
Exposed or Sheltered Hardiness
H4Botanical details
- Family
- Asteraceae
- Native to the UK
- No
- Foliage
- Deciduous
- Habit
- Columnar upright
- Genus
Helianthus can be tall, erect annuals, tuberous or rhizomatous perennials, with coarse simple leaves and large daisy-like flower-heads
- Name status
Accepted
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 or division. Divide established clumps every 2-4 years to both increase plants and retain vigour. See sowing seeds indoors for further advice
Suggested planting locations and garden types
- Cottage and informal garden
- Wildlife gardens
- Cut flowers
- Flower borders and beds
Pruning
Cut back after flowering
Pests
Diseases
May be affected by powdery mildews and sclerotinia diseases
Get involved
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