Alcea Rose

Hollyhock

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Hardy biennial with tall spikes of large bell-shaped flowers in rose shades. Grey-green hairy leaves. Requires full sun and well-drained soil for optimal growth.
yard Outdoor plants wb_sunny Sun pets Pet Friendly
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Plant Details

Common Name Hollyhock
Family Malvaceae
Genus Alcea
Species Rosea
Variety Rose
Origin Asia Minor / Mediterranean
Blooming Summer flowers, often biennial growth cycle
Leaf Color Grey-green, hairy texture
Sunlight Sun
Category Outdoor plants
Pet Friendly check Yes
yard

Care & Maintenance

terrain
Soil

Well-draining fertile garden soil, tolerates clay but prefers loam with pH 6.0-7.5

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Watering

Water regularly during establishment, drought tolerant once mature, avoid waterlogging roots

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Sunlight & Care

Requires full sun exposure for robust flowering and stem strength, resistant to heat

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Fertilization

Apply compost annually in spring, avoid excessive nitrogen which causes weak stems

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Pruning

Deadhead spent flowers to prevent self-seeding or cut back after first flush for second bloom

Pest Control Aphid Hollyhock Weevil Lacewing

These are the insects and pathogens that commonly interact with this plant, including pests, parasites, and organisms typically associated with its care.

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Seasonal Periods

local_florist Flowering Period 3 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
eco Leaf Persistence 12 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
5° – 95°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
40% – 70%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
15000 – 80000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
2000 – 5000
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
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Soil Moisture
20% – 65%
% volumetric
Water content in the growing medium
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Soil EC
300 – 1800
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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