Marrubium vulgare

White Horehound

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Aromatic perennial herb with white woolly leaves and small white flowers, native to Eurasia and North Africa, widely used in herbal medicine for respiratory issues.
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Plant Details

Common Name White Horehound
Family Lamiaceae
Genus Marrubium
Species Vulgare
Origin Mediterranean Basin / Eurasia
Blooming Summer to early autumn, small white flowers in whorls.
Leaf Color Grey-green with white pubescence
Sunlight Sun
Category Kitchen garden plants
Pet Friendly check Yes
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Care & Maintenance

terrain
Soil

Well-drained sandy or loamy soil, tolerates poor and rocky substrates

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Watering

Moderate water during establishment, drought tolerant once mature, avoid waterlogging to prevent root rot

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Sunlight & Care

Full sun exposure required for optimal growth and essential oil production

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Fertilization

Low nutrient requirements, occasional compost application in spring before flowering

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Pruning

Harvest leaves regularly to promote bushiness; cut back after flowering to maintain shape

Pest Control Aphid 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
agriculture Harvesting 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° – 104°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
30% – 70%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
2500 – 60000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
1200 – 3500
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
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Soil Moisture
20% – 45%
% 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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