Alcea Crimson

Crimson Hollyhock

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Hardy biennial with tall spikes of deep crimson, velvety blooms. Prefers full sun and well-drained soil. Ideal for cottage gardens.
yard Outdoor plants wb_sunny Sun pets Pet Friendly
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Plant Details

Common Name Crimson Hollyhock
Family Malvaceae
Genus Alcea
Species Rosea
Variety Crimson
Origin Southwest Asia
Blooming Summer to early autumn, tall flowering spikes
Leaf Color Grey-green, hairy texture
Sunlight Sun
Category Outdoor plants
Pet Friendly check Yes
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Care & Maintenance

terrain
Soil

Well-drained fertile loam; tolerates poor soils but prefers rich earth

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Watering

Moderate water during establishment, drought tolerant once established. Avoid wet feet to prevent root rot.

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Sunlight & Care

Full sun required for best flowering; avoid deep shade

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Fertilization

Apply compost in spring, liquid fertilizer monthly during bloom cycle

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Pruning

Deadhead spent flowers to prolong bloom; cut back after flowering

Pest Control Aphid Japanese Beetle Leaf Miner Slug

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 4 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
eco Leaf Persistence 9 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
41° – 90°
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)
10000 – 60000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
500 – 2000
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
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Soil Moisture
20% – 60%
% 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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