Is horehound easy to grow?

Yes, it is very low maintenance and prefers dry, sunny spots.

Does it need fertilizer?

No, it actually prefers lean soil and too much fertilizer can reduce its flavor.

Plant guide

White horehound.

Marrubium vulgare

Pronounced ma-ROO-bee-um vul-GAH-ree

Also known as Common Hoarhound, Hoarhound, Horehound

Marrubium vulgare — Photo by harrier (CC BY) via gbif

White horehound is a hardy perennial herb known for its crinkly, woolly leaves and long history in traditional medicine. It thrives in poor, dry soil and is quite resilient once established in your garden. You will find it is a fantastic plant for attracting pollinators like bees to your outdoor space.

Another photo of White horehound — Photo by zebedeugalinha (CC BY) via iNaturalist

At a glance

Care level: Easy
Plant type: Herbaceous perennial
Light: Full sun
Indoor light: Direct sun
Water: Every 7 to 14 days
Mature size: 2 feet
Growth rate: Medium
Hardiness: USDA 3 to 10
Bloom time: Late spring to mid summer

Care

Plant this herb in a spot with excellent drainage to prevent root rot. Watch for powdery mildew on the leaves if the air circulation is poor. Give it plenty of sun to keep the growth compact and healthy.

Watering: Allow the soil to dry out completely between waterings as this plant prefers drier conditions.
Feeding: A light application of balanced fertilizer once in the spring is plenty for this hardy grower.
Pruning: Trim back the stems after flowering to encourage a bushier shape and prevent it from becoming woody.
Repotting: Repot only when the roots have filled the container, ensuring you use a pot with good drainage holes.
Soil: Well draining, sandy or rocky soil
Soil pH: 6.0 to 8.0
Temperature: -20 to 35°C
Humidity: 20 to 50%
Drought tolerance: High
Lifespan: Perennial, typically 3 to 5 years.
Fragrance: Light
Deer and rabbits: High

Signs it needs repotting

Roots growing out of the drainage holes.
Water running straight through the pot without soaking in.
Stunted growth despite proper light.

Safety

People: Generally considered safe in culinary amounts, but excessive consumption may cause digestive upset.
Pets: This plant is generally considered non toxic to cats and dogs.
Children: No specific risks, though the fuzzy texture might be irritating if handled excessively.
Contact allergens: The fuzzy, glandular hairs on the leaves can cause mild skin irritation in sensitive individuals.
Airborne allergens: The pollen is generally not considered a significant allergen.
Edibility: Consult a healthcare professional before using as a supplement, as it can interact with medications or cause issues for those with specific health conditions.

How to identify it

Wrinkled, greyish green leaves
Dense, woolly white hairs on stems
Small white flowers in whorls
Square stems typical of mint family

Height: 0.3 to 0.6m
Spread: 0.3 to 0.45m
Leaves: gray-green, semi-evergreen
Flowers: white, 0.5 to 1cm

Problems to watch for

Powdery mildew · White fungal growth on leaves caused by poor air circulation or high humidity.
Aphids · Small insects that cluster on new growth and suck plant sap.

By symptom

Plant problems by symptom

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Growing it

Propagation: seed, division, cuttings
When to plant: spring, autumn
Overwintering: Cut back dead stems in late autumn to keep the plant tidy. It is very cold hardy and requires no special protection in most climates.
In containers: It grows well in containers, provided the pot has excellent drainage and is at least 30 cm wide.

Seed sowing

1. Sow seeds on the surface of moist, well draining soil.
2. Keep the soil lightly moist until germination occurs.
3. Thin seedlings to 30 cm apart once they are large enough to handle.

Plant in a dedicated herb bed with other Mediterranean species that enjoy dry, sunny conditions.

Grows well with

Lavender · They share similar requirements for sun and well draining soil.
Thyme · Both are drought tolerant herbs that thrive in similar conditions.

Similar species

Catnip · Shares a similar growth habit and belongs to the same mint family.

Science

Family: Lamiaceae
Genus: Marrubium
Order: Lamiales
Class: Magnoliopsida
Native range: Europe, northern Africa, and central Asia.
Conservation: It is considered an invasive weed in some regions, so check local regulations before planting.

It survives in the wild by colonizing disturbed, dry areas where other plants struggle to establish.

Value to wildlife: nectar source
Pollinators: bees, butterflies
Uses: medicinal tea, cough drops, pollinator garden, herb garden

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 3/9
Soil reaction: 7/9
Light: 8/9
Temperature: 5/9
Moisture: 2/9
Nutrients: 2/9

Taxonomy resolved against GBIF.

Questions people ask

Is horehound easy to grow?: Yes, it is very low maintenance and prefers dry, sunny spots.
Does it need fertilizer?: No, it actually prefers lean soil and too much fertilizer can reduce its flavor.

Where the name comes from

The genus name Marrubium is derived from the ancient Latin name for the plant, while the species name vulgare means common.

Good to know

The name horehound comes from the Old English words for hoary, meaning white or gray, and hunt, meaning plant.
It was historically used to flavor a popular bitter candy.
The plant is extremely hardy and thrives in poor, rocky soils.

Also in

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This guide was generated with AI on October 19, 2026 and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.