Is garlic mustard good for the garden?

No, it is a destructive invasive species that outcompetes native flora.

How do I get rid of it?

Pull the plants by the root before they set seed and dispose of them in the trash.

Plant guide

Garlic mustard.

Alliaria petiolata

Pronounced al-ee-AIR-ee-uh pet-ee-oh-LAY-tuh

Also known as Garlic Mustard, Hedge mustard, Hedge-garlic, Jack-by-the-hedge

Garlic mustard is a hardy biennial herb that is often considered an invasive species in North America. It produces small white flowers in its second year and smells like garlic when the leaves are crushed. You will often find it growing along woodland edges and in disturbed soil.

At a glance

Care level: Easy
Plant type: Biennial herb
Light: Partial shade to full shade
Indoor light: Medium light
Water: Every 3 to 7 days
Mature size: 3 feet
Growth rate: Fast
Hardiness: USDA 4 to 9
Bloom time: Mid to late spring

Care

This plant is highly adaptable and typically grows without any human intervention. Keep an eye out for its rapid spread, as it can quickly displace native flora in garden settings. It thrives in moist, shaded areas but handles varying conditions well.

Watering: Keep the soil consistently moist but not waterlogged.
Feeding: Fertilizer is not necessary as this plant is very vigorous.
Pruning: Remove flower stalks before they set seed to prevent unwanted spreading.
Repotting: Repotting is rarely needed since this plant is usually treated as a weed.
Soil: Moist, nutrient rich soil
Soil pH: 6.0 to 7.5
Temperature: -30 to 35°C
Humidity: 40 to 80%

Safety

People: The plant is generally considered non toxic to humans when consumed in moderation.
Children: There are no specific safety concerns for children, but it is best to keep them away from invasive weeds.
Contact allergens: Handling the foliage may cause mild skin irritation in sensitive individuals.
Airborne allergens: The pollen is not considered a significant airborne allergen.
Edibility: While edible, this plant is highly invasive and should not be encouraged or cultivated in gardens.

How to identify it

Triangular to heart shaped leaves
Coarsely toothed leaf margins
Distinct garlic scent when crushed
Small four petaled white flowers
Tall slender seed pods

Height: 0.3 to 1m
Spread: 0.15 to 0.3m
Leaves: dark green, semi-evergreen
Flowers: white, 0.5 to 1cm
Fruit: brown, Summer

Problems to watch for

· This plant is extremely hardy and rarely suffers from pests or diseases.

By symptom

Plant problems by symptom

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Growing it

Propagation: seed
When to plant: spring, fall

Do not plant this species as it is an aggressive invader that harms local ecosystems.

Similar species

Violet · The basal rosettes can look similar before the flowering stalk emerges.

Science

Family: Brassicaceae
Genus: Alliaria
Order: Brassicales
Class: Magnoliopsida
Native range: Europe, western and central Asia, and northwestern Africa.
Conservation: It is considered a highly invasive species in North America and should be removed from natural areas.

It thrives in shaded forest understories where it disrupts native mycorrhizal fungi networks.

Value to wildlife: nectar source, larval host plant
Pollinators: bees, butterflies
Uses: culinary herb, pesto ingredient

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 1/9
Soil reaction: 6/9
Light: 4/9
Temperature: 5/9
Moisture: 5/9
Nutrients: 6/9

Taxonomy resolved against GBIF.

Questions people ask

Is garlic mustard good for the garden?: No, it is a destructive invasive species that outcompetes native flora.
How do I get rid of it?: Pull the plants by the root before they set seed and dispose of them in the trash.

Where the name comes from

The name Alliaria comes from the Latin allium, meaning garlic, referring to the scent, while petiolata refers to the petioled leaves.

Good to know

It was brought to North America by settlers for food and medicine.
A single plant can produce thousands of seeds.
The leaves smell like garlic when crushed.
It is a biennial, forming a rosette in the first year and flowering in the second.

Also in

Plants for shade

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This guide was generated with AI on September 26, 2026 and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.