Dianthus barbatus

Sweet William

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Herbaceous biennial with fragrant pink, red, or white clustered flowers. Native to Europe, favored in cottage gardens for vibrant spring blooms.
yard Outdoor plants wb_sunny Sun pets Pet Friendly
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Plant Details

Common Name Sweet William
Family Caryophyllaceae
Genus Dianthus
Species Barbatus
Origin Southern Europe
Blooming Spring to early summer
Leaf Color Blue-green grey
Sunlight Sun
Category Outdoor plants
Pet Friendly check Yes
yard

Care & Maintenance

terrain
Soil

Well-drained, neutral to alkaline soil rich in organic matter. Avoid heavy clay.

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Watering

Moderate watering; allow topsoil to dry between waterings to prevent root rot.

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Sunlight & Care

Requires full sun exposure for best flowering and plant health.

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Fertilization

Apply balanced fertilizer at planting, then stop once buds form.

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Pruning

Deadhead spent flowers to encourage reblooming or cut back after flowering.

Pest Control Aphid Slug Spider Mite Whitefly

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 12 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
23° – 82°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
30% – 60%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
1500 – 60000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
1200 – 5000
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
water
Soil Moisture
15% – 40%
% volumetric
Water content in the growing medium
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Soil EC
400 – 1800
mS/cm
Electrical conductivity (nutrient concentration in soil water)
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Common Problems

Something wrong with your Dianthus barbatus? Select a symptom to diagnose and fix the issue.

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