perennial

Mouse Garlic

Allium angulosum

The Story

Plant Bio

Allium angulosum, commonly known as mouse garlic, is a hardy herbaceous perennial native to damp grasslands and river floodplains across Eurasia. It forms compact clumps of slender, mid-green linear leaves that feature a distinct sharp keel along their undersides.

In mid to late summer, the plant produces dense, hemispherical umbels of pale pink to purple-violet flowers held aloft on distinctly angled, slender scapes. The foliage and bulbs emit a characteristic sulfurous onion scent when bruised, which naturally deters browsing deer and rabbits.

Uses & Benefits:

Produces neat, compact clumps of grassy foliage topped by dense, lilac-pink flower globes that stand out in summer borders.

Contains natural sulfur compounds that make the foliage highly unpalatable to deer, rabbits, and other mammalian pests.

Provides nectar and pollen for a wide range of generalist pollinators, including native bees, butterflies, and hoverflies.

Essentials

At a Glance

Plant Type

Perennial

Height

20"

Width

12"

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8

Water

Medium

Humidity

Moderate

Lifespan

Perennial

Native To

Eurasia

Toxicity

Toxic to Pets

Bloom period

Summer

In flower about 3 months of the year

Planting

How to Grow

Select a planting site in full sun to partial shade with moist, well-drained soil.
Amend heavy soils with coarse sand or organic matter to ensure excellent winter drainage.
Plant bulbs or divisions so the crown sits just below the soil surface, spacing them eight to twelve inches apart.
Water thoroughly after planting to settle the soil, then maintain consistent moisture until the root system is established.

Pro Tip

Avoid planting in heavy, unamended clay soils that retain winter moisture, as waterlogged conditions invariably trigger fatal basal and bulb rot.

Keep It Thriving

Care Guide

Do

Cut back spent flower scapes and dying foliage cleanly to the base in late fall or late winter once the plant enters dormancy.
Incorporate grit or compost into heavy clay soils to prevent winter waterlogging.
Divide established clumps in spring or fall to maintain vigor and propagate new plants.

Don't

Do not over-fertilize with high-nitrogen fertilizers, which stimulates weak, floppy foliage at the expense of flower production.
Do not allow the soil to remain waterlogged during the winter months when the bulbs are highly susceptible to rot.
Do not prune heavily into old, leafless wood or disturb the rhizomes during the active summer flowering period.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Divide
Fertilize
Prune
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Cottage GardensRain GardensRock GardensBorder EdgingWildflower Meadows

Companion Plants

Echinacea purpurea Salvia nemorosa Rudbeckia fulgida

Multiply

Propagation Methods

Good to Know

Common Questions

Mouse Garlic questions

What zones can Mouse Garlic grow in?

Mouse Garlic is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Mouse Garlic deer resistant?

Yes — Mouse Garlic is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Mouse Garlic bloom?

Mouse Garlic typically blooms in summer through summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Mouse Garlic need full sun?

Mouse Garlic does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Mouse Garlic drought tolerant?

Yes — once established (usually after the first full season), Mouse Garlic handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.