Non-native Plants

Wall Barley

Hordeum murinum murinum

USDA symbol: HOMUM

annual grass

Canada: non-native, naturalized
Lower 48 states: non-native, naturalized

If you’ve ever wondered about that scrappy grass popping up in disturbed areas around your neighborhood, you might be looking at wall barley (Hordeum murinum murinum). This annual grass has quite the story to tell, and understanding it can help you make better decisions for your garden and landscape. Wall ...

Wall Barley: What Every Gardener Should Know About This Non-Native Grass

If you’ve ever wondered about that scrappy grass popping up in disturbed areas around your neighborhood, you might be looking at wall barley (Hordeum murinum murinum). This annual grass has quite the story to tell, and understanding it can help you make better decisions for your garden and landscape.

What Exactly Is Wall Barley?

Wall barley is a non-native annual grass that originally hails from the Mediterranean region and parts of Europe and Asia. Despite its humble common name, this plant is also known by the botanical synonyms Critesion murinum. As a member of the grass family (Poaceae), it’s what botanists call a graminoid – essentially a grass or grass-like plant that includes true grasses, sedges, and rushes.

Where You’ll Find Wall Barley

This adaptable grass has made itself at home across a surprising range of North American locations. You can find wall barley growing in British Columbia, Arizona, California, Colorado, Delaware, Maryland, Oregon, Pennsylvania, Utah, and Washington. It’s successfully established itself as a non-native species that reproduces on its own and persists in both Canada and the lower 48 states.

  • Species observed
  • No observations

Should You Plant Wall Barley in Your Garden?

Here’s where things get interesting – and a bit complicated. Wall barley isn’t typically considered a desirable garden plant, and there are several reasons why most gardeners might want to think twice before intentionally adding it to their landscape:

  • It has low ornamental value with a rather coarse, weedy appearance
  • As a non-native species, it doesn’t provide the same ecological benefits as native grasses
  • It tends to pop up in disturbed areas and can spread readily
  • It offers minimal benefits to pollinators since it’s wind-pollinated

Growing Conditions and Characteristics

If wall barley does appear in your area (and it very well might on its own), here’s what you can expect:

This hardy annual grass is remarkably adaptable to various growing conditions. It thrives in disturbed soils, along roadsides, and in waste areas where other plants might struggle. Wall barley is notably drought-tolerant and can establish itself in a wide range of USDA hardiness zones, typically from zones 3 through 10.

The plant completes its entire life cycle in one growing season, germinating, growing, flowering, setting seed, and dying all within a year. This annual habit means it relies entirely on seed production to continue from year to year.

Better Alternatives for Your Garden

Instead of wall barley, consider these native grass alternatives that will provide better ecological value and often superior aesthetic appeal:

  • Buffalo grass (Bouteloua dactyloides) for drought-tolerant areas
  • Blue grama (Bouteloua gracilis) for xeriscaping
  • Little bluestem (Schizachyrium scoparium) for ornamental value
  • Native fescue species appropriate to your region

The Bottom Line

While wall barley isn’t necessarily harmful, it’s not the best choice for intentional garden plantings. Its weedy nature and non-native status mean it won’t contribute to local ecosystems the way native grasses do. If you’re looking to add grasses to your landscape, you’ll get much better results – both aesthetically and ecologically – by choosing native species that have co-evolved with your local wildlife and growing conditions.

Remember, the best gardens work with nature rather than against it, and choosing plants that belong in your region is always a step in the right direction!

Hordeum murinum murinum is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Hordeum murinum murinum is also known as:

Critesion murinum Á. Löve | USDA symbol: CRMU6

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Monocot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Liliopsida - Monocotyledons
Subclass: Commelinidae
Order: Cyperales
Family: Poaceae Barnhart - Grass family
Genus: Hordeum L. - barley

Species: Hordeum murinum L. - mouse barley

Subspecies: Hordeum murinum L. ssp. murinum - wall barley

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA