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Herbaceous Perennial
Size
Ultimate height
2.5–4 metresTime to ultimate height
1–2 yearsUltimate spread
1–1.5 metresGrowing conditions
Chalk
Loam
Sand
Clay
Moisture
Moist but well–drained, Well–drainedpH
Neutral, AlkalineColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green Red | Green | ||
|---|---|---|---|---|
| Summer | Green Red | Yellow | Green | |
| Autumn | Green Red | Yellow | Green | |
| Winter |
Position
- Full sun
- Partial shade
Aspect
South–facing or West–facing
Exposure
Sheltered Hardiness
H4Botanical details
- Family
- Asteraceae
- Native to the UK
- No
- Foliage
- Deciduous
- Habit
- Spreading branched, 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
How to grow
Cultivation
Grow in a moderately fertile, humus-rich, moist, well-drained, neutral to alkaline soil in full sun. May need support. See staking: perennials
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
- Coastal
- Wildflower meadow
- Prairie planting
- Cut flowers
- Flower borders and beds
- Wall side borders
Pruning
Deadhead to prolong flowering
Pests
Diseases
May be susceptible to Powdery mildews and sclerotinia diseases
Get involved
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