Helianthus Perennial
Helianthus × laetiflorus
flowerThis hybrid perennial sunflower produces bright yellow double or semi-double flowers that resemble dahlias, blooming from mid-summer to fall. Growing 4–6 feet tall, it is vigorous and excellent for cut flowers and late-season garden color. It thrives in full sun with well-drained soil and is relatively pest- and disease-resistant.
Common Problems
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Care Guide
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Light
Full sun (6+ hours daily); requires strong light for flowering and sturdy stems
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Water
Moderate; water regularly during growing season; drought-tolerant once established; reduce in winter
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Soil
Well-drained soil; tolerates poor to moderate fertility; slightly acidic to neutral pH
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Fertiliser
Apply balanced fertilizer in spring; avoid excessive nitrogen which promotes foliage over flowers
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Temperature
Prefers warm summers; very cold hardy in dormancy
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Humidity
Low to moderate humidity; good air circulation prevents fungal issues
Toxicity
check_circleSafe for Catscheck_circleSafe for Dogscheck_circleSafe for Children
Non-toxic; seeds safe for consumption
Common Diseases
Common Pests
Seasonal Care
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Resume regular watering and feeding as growth picks up.
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Peak growing season. Water and feed regularly.
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Reduce watering as growth slows. Stop heavy feeding.
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Minimal watering and feeding. Protect from frost if needed.