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PlantSnap
Plant Care
Bristly hollyhock
(Alcea setosa)
Also Known As
Bristly hollyhock, Hairy hollyhock, Native hollyhock
About This Plant
Alcea setosa is a flowering plant species in the family Malvaceae. It is a biennial or perennial that grows up to 3 feet (91 cm) tall and 2 feet (61 cm) wide. The leaves are palmately lobed and hairy. The flowers are pink, purple, or white and bloom in the summer.
Plant Care Instructions
Outdoor Size Range
Up to 3 feet (91 cm) tall and 2 feet (61 cm) wide
Light Requirements
Full sun to partial shade. At least 6 hours of direct sunlight per day.
Humidity Needs
Prefers moderate to high humidity.
Fertilizing Schedule
Fertilize once a month during the growing season with a balanced fertilizer. Stop fertilizing after the plant blooms.
Pruning Guidelines
Prune dead or damaged leaves and stems as needed. Cut back the entire plant to the ground after it has finished blooming.
Common Pests and Diseases
Aphids and spider mites are common pests for Alcea setosa. Root rot can occur if the soil is too wet.
Indoor Size Range
Not suitable for indoor growth
Watering Schedule
Regular watering, about 1 inch (2.5 cm) per week. Keep soil moist but not waterlogged.
Temperature Range
Hardy in USDA zones 4-9. Can tolerate cold temperatures but prefers warm temperatures between 60-75°F (15-24°C).
Growing Season
Summer
Growing Difficulty Level
Moderately difficult to grow. Requires regular watering and fertilizing to thrive.
USDA Hardiness Zones
4-9
Did You Know?
Alcea setosa is native to western North America and was used by Native Americans for medicinal purposes, including treating coughs and sore throats.
