North America Non-native Plant

Rye Brome

Botanical name: Bromus secalinus var. decipiens

USDA symbol: BRSED

Life cycle: annual

Habit: grass

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

Rye Brome: What Gardeners Need to Know About This Naturalized Annual Grass If you’ve stumbled across the name rye brome (Bromus secalinus var. decipiens) in your gardening research, you might be wondering whether this annual grass deserves a spot in your landscape. While this European transplant has made itself at ...

Rye Brome: What Gardeners Need to Know About This Naturalized Annual Grass

If you’ve stumbled across the name rye brome (Bromus secalinus var. decipiens) in your gardening research, you might be wondering whether this annual grass deserves a spot in your landscape. While this European transplant has made itself at home in parts of North America, there are some important things to consider before welcoming it into your garden.

What is Rye Brome?

Rye brome is a non-native annual grass that originally hails from Europe but has established itself in the wild across parts of the United States. This variety of Bromus secalinus has proven quite adaptable, managing to reproduce on its own without any help from gardeners and persisting in various environments throughout the lower 48 states.

Where Does Rye Brome Grow?

Currently, this particular variety of rye brome has been documented growing wild in California and North Carolina, though it may be present in other areas as well. Its ability to establish itself spontaneously suggests it’s quite the opportunist when it comes to finding suitable growing conditions.

Should You Plant Rye Brome in Your Garden?

Here’s where things get a bit tricky. While rye brome isn’t officially classified as invasive or noxious, its track record of spreading on its own raises some red flags for thoughtful gardeners. This grass doesn’t offer much in terms of aesthetic appeal or ecological benefits that would make it worth intentionally introducing to your landscape.

Instead of rolling the dice with a non-native species that might become problematic, consider these alternatives:

  • Native bunch grasses that provide habitat for local wildlife
  • Regional wildflower and grass mixes designed for your specific area
  • Established native grasses that support pollinators and birds

Growing Conditions and Care

While we don’t recommend intentionally planting rye brome, understanding its preferences can help you identify it if it shows up uninvited. As an annual grass, it completes its entire life cycle in one growing season, which means it relies on producing plenty of seeds to ensure the next generation.

Like many introduced species, rye brome appears to be quite adaptable to different growing conditions, which is part of what makes it successful at establishing itself in new areas.

The Bottom Line

While rye brome isn’t necessarily a garden villain, it’s not exactly a garden hero either. With so many beautiful native grasses and wildflowers to choose from, why not give your local ecosystem the support it needs? Your native pollinators, birds, and other wildlife will thank you for choosing plants that have evolved alongside them.

If you’re looking to add grasses to your landscape, consider reaching out to your local native plant society or extension office for recommendations that will truly thrive in your specific growing conditions while supporting local wildlife.

Rye 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 secalinus L. - rye brome

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