Non-native Plants

Purple False Brome

Brachypodium distachyon

USDA symbol: BRDI2

annual grass

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

If you’ve stumbled across the name purple false brome while researching grasses for your garden, you might be wondering what this delicate-sounding plant is all about. Also known by its scientific name Brachypodium distachyon, this annual grass has quietly established itself across several U.S. states, though it’s not originally from ...

Purple False Brome: A Mediterranean Grass That’s Made Its Mark in America

If you’ve stumbled across the name purple false brome while researching grasses for your garden, you might be wondering what this delicate-sounding plant is all about. Also known by its scientific name Brachypodium distachyon, this annual grass has quietly established itself across several U.S. states, though it’s not originally from around here.

What Exactly Is Purple False Brome?

Purple false brome is a small annual grass that hails from the Mediterranean region. Don’t let the purple in its name get your hopes up for dramatic color—this grass is fairly modest in appearance, with subtle purple tinges on its delicate seed heads that give it its common name. You might also see it listed under its old scientific names, Bromus distachyos or Trachynia distachya, if you’re digging through older gardening references.

Where You’ll Find It Growing

Originally a Mediterranean native, purple false brome has made itself at home in scattered locations across the United States. You can find established populations in California, Colorado, Hawaii, New Jersey, Oregon, and Texas. It’s what botanists call a non-native species that reproduces on its own in the wild without any help from gardeners.

  • Species observed
  • No observations

The Good, The Bad, and The Realistic

Let’s be honest—purple false brome isn’t going to win any showstopper plant of the year awards. Here’s what you’re getting if you decide to grow it:

  • A small, unassuming annual grass
  • Delicate seed heads with subtle purple coloring
  • Easy-care growing habits
  • Self-seeding tendencies

While it’s not considered invasive, it’s also not contributing much to local ecosystems in terms of supporting native wildlife or pollinators. Like most grasses, it’s wind-pollinated, so don’t expect butterflies and bees to flock to it.

Growing Conditions and Care

If you’re determined to give purple false brome a try, you’ll find it’s refreshingly low-maintenance. This grass thrives in USDA hardiness zones 8-11 and prefers:

  • Full sun exposure
  • Well-drained soils
  • Minimal watering once established

As an annual, it completes its entire life cycle in one growing season, but it readily self-seeds, so you might find it popping up year after year if conditions are right.

Better Alternatives for Your Garden

While purple false brome isn’t harmful, you might want to consider native grass alternatives that offer similar easy-care benefits while supporting local wildlife. Depending on your region, native bunch grasses or other indigenous species could provide better ecological value and often more visual interest too.

Some native alternatives to research for your area might include little bluestem, buffalo grass, or regional sedges—all of which tend to be more beneficial for local birds, insects, and overall ecosystem health.

The Bottom Line

Purple false brome is neither a garden villain nor a must-have treasure. It’s a quiet, undemanding grass that does its own thing without causing major problems. If you’re looking for a low-maintenance annual grass and happen to come across seeds, it won’t hurt to try it. Just remember that choosing native plants whenever possible is usually the better bet for creating a garden that truly supports your local environment.

Brachypodium distachyon 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. Brachypodium distachyon is also known as:

Bromus distachyos | USDA symbol: BRDI9
Trachynia distachya | USDA symbol: TRDI10

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: Brachypodium P. Beauv. - false brome

Species: Brachypodium distachyon (L.) P. Beauv. - purple false brome

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