About
A bushy, branching annual to about 1.2m, with roughly hairy, heart-shaped leaves. From mid-summer to mid-autumn produces pollen-free, pale lemon yellow flowers with dark brown centres.
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, Partial shade
Soil typeChalk, Clay, Loam, Sand
Soil pHAcid, Alkaline, Neutral
Soil moistureMoist but well-drained, Well-drained
AspectSouth-facing, West-facing
ExposureSheltered
UK hardinessH2
Plant details
Plant typeAnnual Biennial, Bedding
HabitColumnar upright, Spreading branched
FoliageDeciduous
Height1-1.5 metres
Spread0.1-0.5 metres
Time to full height1 year
Suggested usesCottage and informal garden, Wildlife gardens
Care notes
CultivationGrow in moderately fertile, neutral to alkaline, humus-rich, moist but well-drained soil in full sun. This plant was included in the RHS Helianthus (sunflower) trial 2024
PruningDeadhead to prolong 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