Size
Ultimate height
1–1.5 metresTime to ultimate height
2–5 yearsUltimate spread
0.5–1 metresGrowing conditions
Moisture
Moist but well–drainedpH
Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green | |||
|---|---|---|---|---|
| Summer | Yellow | Green | ||
| Autumn | Yellow | Green | ||
| Winter |
Position
- Full sun
Aspect
South–facing or West–facing or ·¡²¹²õ³Ù–f²¹³¦¾±²Ô²µ
Exposure
Sheltered Hardiness
H5Botanical details
- Family
- Asteraceae
- Native to GB / Ireland
- 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 a moderately fertile, humus-rich, moist but well-drained, neutral to alkaline soil in full sun. Needs a long hot summer to flower well. May need support
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
- Wildlife gardens
- Cottage and informal garden
- Prairie planting
- Cut flowers
- Flower borders and beds
Pruning
Cut back after flowering
Pests
Diseases
May be susceptible to powdery mildews and sclerotinia diseases
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