About
This tough upright perennial to 2m, the flower heads to 10cm wide, with bright yellow rays surrounding a dark red centre.
About the genus
Helianthus can be tall, erect annuals, tuberous or rhizomatous perennials, with coarse simple leaves and large daisy-like flower-heads
Growing conditions
SunlightFull sun
Soil typeChalk, Clay, Loam
Soil pHAlkaline, Neutral
Soil moistureMoist but well-drained
AspectWest-facing, South-facing, East-facing
ExposureSheltered
UK hardinessH5
Plant details
Plant typeHerbaceous Perennial
HabitBushy
FoliageDeciduous
Height1.5-2.5 metres
Spread0.5-1 metres
Time to full height2-5 years
Suggested usesCity and courtyard gardens, Coastal, Cottage and informal garden
Care notes
CultivationGrow 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
PruningCut back after flowering
PropagationPropagate 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
Pest resistanceMay be susceptible to slugs and snails
Disease resistanceMay be susceptible to powdery mildews and Sclerotinia diseases