North America Non-native Plant

Persian Ryegrass

Botanical name: Lolium persicum

USDA symbol: LOPE2

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: Lolium dorei B. Boivin (LODO4)  âš˜  Lolium dorei B. Boivin var. laeve (LODOL)   

Persian Ryegrass: A Lesser-Known Grass with Limited Growing Information If you’ve stumbled across the name Persian ryegrass (Lolium persicum) in your gardening research, you might be wondering what exactly this grass is all about. Well, you’re not alone in your curiosity! This particular species is something of a mystery in ...

Persian Ryegrass: A Lesser-Known Grass with Limited Growing Information

If you’ve stumbled across the name Persian ryegrass (Lolium persicum) in your gardening research, you might be wondering what exactly this grass is all about. Well, you’re not alone in your curiosity! This particular species is something of a mystery in the gardening world, with limited information available compared to its more popular ryegrass cousins.

What is Persian Ryegrass?

Persian ryegrass is a graminoid – that’s fancy talk for a grass or grass-like plant. It belongs to the same family as the more commonly known perennial ryegrass and annual ryegrass, but it’s definitely the lesser-known sibling of the bunch. You might also see it listed under its synonyms Lolium dorei in some botanical references, though these names aren’t commonly used in everyday gardening.

This grass can behave as either an annual or perennial, depending on growing conditions – talk about being flexible with its life choices!

Where Does Persian Ryegrass Grow?

Persian ryegrass is a non-native species that has established itself in various parts of North America. You can find it growing in several Canadian provinces including Alberta, British Columbia, Manitoba, Ontario, Quebec, and Saskatchewan. In the United States, it pops up in Colorado, Missouri, Montana, New York, North Dakota, and Wyoming.

As the name suggests, this grass likely originated from the Persian region of the Middle East before making its way to North America, where it now reproduces on its own in the wild.

Should You Grow Persian Ryegrass?

Here’s where things get a bit tricky. Unlike some of its ryegrass relatives, Persian ryegrass doesn’t have a wealth of information available about its garden performance, aesthetic qualities, or specific growing requirements. This makes it challenging to recommend for home gardeners who want predictable results.

Since it’s a non-native species without detailed cultivation information, you might want to consider some alternatives:

  • Native bunch grasses specific to your region
  • Well-documented ryegrass varieties with known performance
  • Local native grasses recommended by your extension office

The Information Gap

Unfortunately, many details about Persian ryegrass remain unknown, including:

  • Specific growing conditions and soil preferences
  • Mature height and spread
  • Hardiness zones
  • Wildlife and pollinator benefits
  • Invasive potential
  • Wetland tolerance

A Word of Caution

While Persian ryegrass isn’t currently listed as invasive or noxious, its ability to reproduce spontaneously in the wild means it has naturalized successfully. When choosing plants for your landscape, especially non-native ones, it’s always wise to research their behavior in your specific region and consider native alternatives first.

The Bottom Line

Persian ryegrass remains something of an enigma in the gardening world. Without reliable information about its garden performance, growing requirements, or potential benefits, it’s difficult to make a strong case for including it in your landscape. Your best bet is to explore well-documented native grasses that will provide known benefits to your local ecosystem while giving you the reliable performance you want in your garden.

If you’re determined to learn more about this mysterious grass, consider reaching out to your local extension office or native plant society – they might have region-specific insights that aren’t widely available in gardening literature.

Persian Ryegrass

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

Lolium L. - ryegrass

Species

Lolium persicum Boiss. & Hohen. ex Boiss. - Persian ryegrass

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