North America Native Plant

Pumpelly’s Brome

Botanical name: Bromus inermis pumpellianus var. pumpellianus

USDA symbol: BRINP5

Life cycle: perennial

Habit: grass

Native status: Native to Alaska ⚘ Native to Canada ⚘ Native to the lower 48 states ⚘ Native to St. Pierre and Miquelon  

Synonyms: Bromus ciliatus L. var. coloradensis Vasey ex Beal (BRCIC)  ⚘  Bromopsis dicksonii (Mitchell & Wilton) Á. Löve & D. Löve (BRDI10)  ⚘  Bromopsis inermis (Leyss.) Holub ssp. pumpelliana (Scribn.) W.A. Weber (BRINP3)  ⚘  Bromus inermis Leyss. var. purpurascens (Hook.) Wagnon (BRINP6)  ⚘  Bromus inermis Leyss. var. tweedyi (Scribn. ex Beal) C.L. Hitchc. (BRINT2)  ⚘  Bromus pumpellianus Scribn. (BRPU3)  ⚘  Bromopsis pumpelliana (Scribn.) Holub (BRPU9)  ⚘  Bromus pumpellianus Scribn. ssp. dicksonii Mitchell & Wilton (BRPUD)  ⚘  Bromus pumpellianus Scribn. var. tweedyi Scribn. ex Beal (BRPUT)  ⚘  Bromus pumpellianus Scribn. var. villosissimus Hultén (BRPUV)   

Pumpelly’s Brome: A Hardy Native Grass for Cool-Climate Gardens If you’re looking for a resilient native grass that can handle whatever Mother Nature throws at it, let me introduce you to Pumpelly’s brome (Bromus inermis pumpellianus var. pumpellianus). This unassuming perennial grass might not win any flashy flower contests, but ...

Pumpelly’s Brome: A Hardy Native Grass for Cool-Climate Gardens

If you’re looking for a resilient native grass that can handle whatever Mother Nature throws at it, let me introduce you to Pumpelly’s brome (Bromus inermis pumpellianus var. pumpellianus). This unassuming perennial grass might not win any flashy flower contests, but it’s got character, history, and the kind of tough-as-nails attitude that makes gardeners in challenging climates do a little happy dance.

Meet Your New Grass Friend

Pumpelly’s brome is a native perennial grass that’s been quietly doing its thing across North America long before we started fussing over lawn perfection. Named after the geologist Raphael Pumpelly, this grass has earned its stripes as a true survivor in some pretty tough neighborhoods – think boreal forests, mountain meadows, and other places where the growing season is more like a growing suggestion.

Where Does It Call Home?

This grass is a true North American native with an impressive range that spans from Alaska all the way down through Canada and into the northern United States. You’ll find it naturally growing in Alberta, British Columbia, Manitoba, Ontario, Quebec, Saskatchewan, Yukon, Northwest Territories, and Nunavut. In the U.S., it calls Alaska, Colorado, Idaho, Michigan, Montana, New Mexico, Oregon, Washington, and Wyoming home, plus it shows up in Newfoundland and Labrador.

Why You Might Want to Grow Pumpelly’s Brome

Here’s the thing about Pumpelly’s brome – it’s not trying to be the star of your garden show. Instead, it’s the reliable supporting actor that makes everything else look good while quietly doing important work behind the scenes.

  • Hardy as they come: This grass thrives in USDA hardiness zones 2-6, meaning it can handle some seriously cold temperatures
  • Low maintenance: Once established, it pretty much takes care of itself
  • Native benefits: Supporting local ecosystems and providing habitat for wildlife
  • Erosion control: Those roots are great at holding soil in place
  • Drought tolerance: While it prefers moisture, it can handle dry spells better than many grasses

Perfect Garden Spots

Pumpelly’s brome isn’t really a front-lawn kind of grass – it’s more of a let’s restore this meadow or naturalized area behind the shed type of plant. It shines in:

  • Prairie restoration projects
  • Native plant gardens
  • Naturalized landscapes
  • Erosion-prone slopes
  • Wildlife habitat areas
  • Low-maintenance buffer zones

Growing Conditions That Make It Happy

The beauty of Pumpelly’s brome is that it’s not particularly fussy. Here’s what it prefers:

  • Light: Full sun to partial shade
  • Soil: Adaptable to various soil types, from sandy to clay
  • Moisture: Prefers consistent moisture but can tolerate some drought
  • Climate: Cool, northern climates where it can experience proper winter chill

Planting and Care Tips

Getting Pumpelly’s brome established is refreshingly straightforward:

  • Seeding: Direct seed in fall or early spring when soil can be worked
  • Spacing: If planting plugs, space them 12-18 inches apart
  • Watering: Keep consistently moist during establishment, then reduce watering frequency
  • Maintenance: Minimal once established – occasional mowing or cutting back in late fall if desired
  • Fertilizing: Generally unnecessary; this grass is adapted to nutrient-moderate soils

Wildlife and Ecosystem Benefits

While we don’t have specific data on wildlife benefits for this particular variety, native grasses like Pumpelly’s brome typically provide important ecosystem services. They offer nesting sites for ground-dwelling birds, shelter for small mammals, and their seeds can provide food for various wildlife species. The grass structure also creates microhabitats that support beneficial insects.

Is Pumpelly’s Brome Right for Your Garden?

This grass is perfect for you if you’re looking to support native ecosystems, need a low-maintenance solution for naturalized areas, or want to establish authentic regional landscapes in cooler climates. It’s especially valuable for gardeners in northern regions who struggle to find truly native grass options.

However, if you’re looking for a formal lawn grass or something with showy flowers, this probably isn’t your match. Pumpelly’s brome is all about subtle beauty and ecological function rather than ornamental pizzazz.

In the world of native plants, Pumpelly’s brome might not be the flashiest choice, but it’s definitely one of the most dependable. Sometimes the best garden additions are the ones that simply get on with the business of growing, supporting wildlife, and making your landscape a little more connected to the natural world around it.

Pumpelly’s 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 inermis Leyss. - smooth brome

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