Hollyhock
Alcea rosea
flowerHollyhocks are iconic tall biennials with large, showy flowers that bloom in a wide range of colors along sturdy vertical stems. They create dramatic height and structure in gardens, thriving in full sun and tolerating poor soil conditions. These heirloom flowers self-seed prolifically and are beloved for cottage gardens and romantic plantings.
Common Problems
Select the problem your Hollyhock is experiencing to get a treatment guide.
Care Guide
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Light
Full sun; requires 6+ hours of direct sunlight daily for optimal growth and flowering
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Water
Water regularly; maintain evenly moist soil during growing season and reduce in dormancy
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Soil
Well-draining soil; tolerates poor to moderately fertile soil; pH 6.0–8.0
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Fertiliser
Light feeding in spring with balanced or low-nitrogen fertilizer; avoid overfertilizing
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Temperature
Cool-season plant; prefers 60–75°F; requires winter chill for second-year flowering
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Humidity
Low to moderate humidity; ensure good air circulation to prevent rust and mildew
Toxicity
check_circleSafe for Catscheck_circleSafe for Dogscheck_circleSafe for Children
Non-toxic to cats, dogs, and children
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.