North America Non-native Plant

Soft Brome

Botanical name: Bromus hordeaceus thominei

USDA symbol: BRHOT

Life cycle: annual

Habit: grass

Native status: Non-native, reproduces and persists in the wild in Canada âš˜ Non-native, reproduces and persists in the wild in the lower 48 states  

Synonyms: Bromus thominei Hardham ex Nyman (BRTH2)   

Soft Brome: Understanding This Non-Native Grass in North American Gardens If you’ve stumbled across the name soft brome while researching grasses for your garden, you’ve encountered one of those plants that sits in a bit of a gray area. Bromus hordeaceus thominei, commonly known as soft brome, is an annual ...

Soft Brome: Understanding This Non-Native Grass in North American Gardens

If you’ve stumbled across the name soft brome while researching grasses for your garden, you’ve encountered one of those plants that sits in a bit of a gray area. Bromus hordeaceus thominei, commonly known as soft brome, is an annual grass that has made its way into North American landscapes, though it didn’t start here.

What Exactly Is Soft Brome?

Soft brome is an annual grass that belongs to the broader Bromus family. You might also see it listed under its synonym, Bromus thominei Hardham ex Nyman, in some botanical references. As an annual, this grass completes its entire life cycle in one growing season – sprouting, growing, reproducing, and dying all within a year.

Where You’ll Find It Growing

This grass has established itself in several regions across North America, despite not being native to the continent. You can find soft brome growing in:

  • British Columbia, Canada
  • Connecticut
  • Maine
  • Massachusetts
  • Rhode Island

The plant has managed to reproduce spontaneously in the wild and tends to persist in these areas without human intervention.

Should You Plant Soft Brome in Your Garden?

Here’s where things get a bit tricky. While soft brome isn’t currently classified as invasive or noxious (at least in available records), its non-native status means it’s not providing the same ecological benefits that native grasses would offer to your local ecosystem.

Since many details about this particular grass remain unknown – including its specific growing conditions, wildlife benefits, and overall garden performance – it’s hard to make a strong case for or against it. However, as gardeners increasingly focus on supporting local ecosystems, you might want to consider native grass alternatives instead.

Native Alternatives to Consider

If you’re looking for annual grasses that will better support your local wildlife and ecosystem, consider researching native grass species in your region. Native plants have evolved alongside local wildlife and are typically better at:

  • Supporting native birds, insects, and other wildlife
  • Adapting to local climate conditions
  • Requiring fewer resources once established
  • Contributing to the health of local ecosystems

The Bottom Line

While soft brome isn’t necessarily harmful to plant, it’s one of those why not choose something better? situations. With so many beautiful native grasses available that offer clear benefits to wildlife and adapt well to local conditions, you might find more satisfaction in exploring those options instead.

If you do encounter soft brome growing wild in your area, there’s no need to panic – it’s not causing major ecological disruption. But for your intentional garden plantings, consider giving native species the spotlight they deserve.

Remember, every plant choice in our gardens is an opportunity to support the intricate web of life that surrounds us. While we can’t always make perfect choices, we can make informed ones that lean toward supporting our local ecosystems whenever possible.

Soft Brome

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Commelinidae

Order

Cyperales

Family

Poaceae Barnhart - Grass family

Genus

Bromus L. - brome

Species

Bromus hordeaceus L. - soft brome

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