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Region profile

Columbia Mountains/Northern Rockies

Columbia Mountains/Northern Rockies is a topographically interesting region covering the Interior Wet Belt of British Columbia and surrounding areas, characterized by rugged topography, a severe mid-latitude climate, maritime-influenced forests, and characteristic wildlife like grizzly bear and mountain goat.

Zone

Interior

Common Name

Columbia Mountains/Northern Rockies

CEC Level III Code

6.2.3

CEC Level II Code

6.2 Western Cordillera

Overview

About This Region

The Columbia Mountains/Northern Rockies ecoregion is vital for biodiversity, including pollinators. Key threats here mirror global trends: habitat loss from human development and resource extraction, misuse of pesticides impacting beneficial insects, and the escalating effects of climate change. Increased temperatures and extreme weather events contribute to range shifts and phenological mismatches between plants and pollinators. High vulnerability is projected for this region, making conservation efforts critical for its subalpine woodlands and forest ecosystems.

Region facts

At a glance

AliasesColumbia Mountains/Northern Rockies, Columbia Mountains Northern Rockies, CEC 6.2.3
Geographic Range
This region, known as the Interior Wet Belt of British Columbia, encompasses the Cariboo, Columbia, and Selkirk Mountains, extending into the Northern Rocky Mountains of eastern Washington, northern Idaho, and northwest Montana, and is characterized by rugged, high and low mountains, narrow valleys, and deep canyons.
Climate SnapshotThe ecoregion has a severe, mid-latitude climate with dry, warm summers and cold, snowy winters, featuring a mean annual temperature range of 0°C to 9°C and mean annual precipitation of 1,200 mm.
Terrain ProfileThis region is characterized by rugged topography with high and low mountains, narrow valleys, and deep canyons, featuring some peaks over 3,000 meters above sea level.
Vegetation CoverForests in this region are influenced by maritime moisture, featuring Pacific indicator species such as western hemlock and western red cedar, alongside Douglas fir, spruce, and various pines and firs.
Wildlife HabitatThe Columbia Mountains/Northern Rockies region is home to characteristic wildlife including grizzly and black bear, woodland caribou, mountain goat, mule and white-tailed deer, American elk, moose, bobcat, cougar, snowshoe hare, various grouse, osprey, bald eagle, several jays and ravens, mountain bluebird, spotted and Pacific tree frogs, trout, and salmon.

Eco snapshot

What shapes this region

Climate pattern

  • Strong microclimates (small local weather differences) caused by elevation, slope direction, and valley winds.
  • Snowpack and spring melt often shape when flowers start and how long they last.
  • Sunny, south-facing sites can warm earlier; shaded or higher sites may stay cool longer.

Vegetation profile

Forests in this region are influenced by maritime moisture, featuring Pacific indicator species such as western hemlock and western red cedar, alongside Douglas fir, spruce, and various pines and firs.

Wildlife profile

The Columbia Mountains/Northern Rockies region is home to characteristic wildlife including grizzly and black bear, woodland caribou, mountain goat, mule and white-tailed deer, American elk, moose, bobcat, cougar, snowshoe hare, various grouse, osprey, bald eagle, several jays and ravens, mountain bluebird, spotted and Pacific tree frogs, trout, and salmon.

Why pollinators matter here

  • Pollinators help wildflowers and shrubs set seed, supporting food webs.
  • Meadow and edge habitats can be especially important “flower hotspots.”
  • Shorter seasons make continuous bloom planning more important.
  • Healthy pollinator communities support resilient native plant communities after disturbance.

Seasonal timing

Planting seasons

Timing varies by microclimate; use this as a flexible guide.

Seasonal timing

  • Early spring: Focus on early-blooming natives and cleanup that doesn’t remove nesting habitat.
  • Late spring to early summer: Main planting window for many perennials; watch soil moisture as temperatures rise.
  • Mid to late summer: Add “bridge” bloomers and keep young plants watered until established.
  • Fall: Good for planting some perennials and for leaving stems/leaf litter for overwintering insects.

Quick seasonal checklist

  • Choose plants for three bloom periods (early/mid/late).
  • Plant in clumps (easier for pollinators to find).
  • Add at least one shrub if you have space (often big nectar/pollen payoff).
  • Leave some areas undisturbed for nesting and winter shelter.

Yearly needs

Pollinator calendar

What pollinators need throughout the year, and what to do about it.

Late winter/early springEarly nectar/pollen; safe shelter as insects emergeKeep some leaf litter/stems until weather is consistently mild; plant/plan early bloomers
SpringA steady ramp-up of blooms; nesting sitesPlant native perennials; leave some bare, well-drained soil; avoid all pesticides
SummerReliable flowers during peak activity; water during dry spellsAdd mid-season “workhorse” flowers; provide a shallow water source with landing stones
Late summer/fallLate blooms to fuel overwintering; seeds/structurePlant late-season natives; avoid heavy fall cleanup; let some plants go to seed
Winter or Dry SeasonProtected overwintering habitatLeave stems standing; keep brush/wood piles tidy-but-present; plan next season’s bloom sequence

Seed mix concept

A Billion Small Steps Seed mix

A simple way to plan is to think in three layers, so something is always blooming:

Spring starter

Spring starter: early bloomers (often bulbs/perennials and early shrubs) to support emerging bees.

Summer bridge

Summer bridge: long-blooming, mid-season flowers that carry the garden through peak activity.

Fall finisher

Fall finisher: late-season asters/goldenrods/shrubs that help pollinators fuel up before winter.

What You Can Do

Make a difference for native habitats.

Turn this knowledge into action. Whether you plant a single pot or a whole garden, you are building a vital bridge for local biodiversity.

Join the movement to restore our shared habitats.

Native plants

Plants that thrive in this region

Alders (*Alnus* spp.)

Alders

Alders are fast-growing trees in the genus Alnus that are especially useful in damp spots and along edges where you want quick cover and early-season pollen for insects.

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Asters (*Symphyotrichum* spp.)

Asters

Asters are late-season wildflowers that bring a burst of daisy-like blooms when many gardens are winding down, making them a reliable choice for pollinator-friendly planting.

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Birches (*Betula* (genus))

Birches

Birches are graceful trees in the genus Betula, known for their often light-colored bark and early-season pollen and catkins that support springtime insects.

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Blueberries & huckleberries (*Vaccinium* (genus))

Blueberries & huckleberries

Blueberries and huckleberries (genus Vaccinium) are berry-producing shrubs with spring flowers that can support pollinators and later feed people and wildlife—great for gardens, schoolyards, and even large containers.

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Clovers (*Trifolium* spp.)

Clovers

Clovers are small, easygoing plants in the genus Trifolium that can add nectar and pollen to gardens, lawns, and pots while helping cover bare soil.

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Fireweed (*Chamerion* spp.)

Fireweed

Fireweed is a tough, fast-growing wildflower in the genus Chamerion that brings bright pink blooms and lots of pollinator activity to sunny, open spaces.

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Fleabanes (*Erigeron* spp.)

Fleabanes

Fleabanes (genus Erigeron) are easygoing wildflowers with daisy-like blooms that can brighten gardens, schoolyards, and balcony pots while offering steady nectar and pollen for many small pollinators.

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Goldenrods (*Solidago* spp.)

Goldenrods

Goldenrods are tough, sunny wildflowers in the genus Solidago that light up late-season gardens with golden blooms and provide reliable nectar and pollen when many other flowers are fading.

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Kinnikinnick (Arctostaphylos spp.)

Kinnikinnick

Kinnikinnick is a tough, low-growing evergreen groundcover in the genus Arctostaphylos (often called bearberry) that forms a tidy mat and offers small spring flowers followed by red berries.

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Manzanitas (West) (Arctostaphylos spp.)

Manzanitas

Manzanitas are tough, beautiful western shrubs with urn-shaped flowers that can feed early-season pollinators and evergreen leaves that keep gardens looking good year-round.

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Poplars, aspens & cottonwoods (*Populus*)

Poplars, aspens & cottonwoods

Poplars, aspens, and cottonwoods (genus Populus) are fast-growing trees best known for their fluttering leaves and soft “cottony” seeds. They can support early-season pollinators with spring catkins, but they’re also big, thirsty, and often short-lived in small yards—so they’re best chosen with space and roots in mind.

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Rushes (*Juncus* spp.)

Rushes

Rushes are tough, grass-like wetland plants (genus Juncus) that thrive in damp soil and help create calm, sheltered habitat at the edges of ponds, rain gardens, and low spots.

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Sedges (*Carex* (genus))

Sedges

Sedges (genus Carex) are grass-like plants that form tidy clumps and thrive in many garden conditions, especially where soil stays a bit damp. They add texture, cover bare ground, and can support small wildlife by providing shelter and nesting material.

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Willowherbs (*Epilobium* spp.)

Willowherbs

Willowherbs (genus Epilobium) are easygoing wildflowers that pop up in sunny, open spots and offer simple, nectar-rich blooms that many small pollinators can use.

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Willows (*Salix* spp.)

Willows

Willows are fast-growing trees and shrubs in the genus Salix that offer some of the earliest pollen and nectar of the year, making them a strong choice for pollinator-friendly yards, parks, and school grounds.

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Yarrow (*Achillea millefolium*)

Yarrow

Yarrow is a tough, easygoing wildflower that brings long-lasting blooms and steady pollinator visits to gardens, schoolyards, and even containers.

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Pollinators

Pollinators active in this region

Bee flies (Family Bombyliidae)

Bee flies

Adults visit flowers for nectar and can move pollen between blooms; their presence is a sign of diverse, functioning habitats.

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Bumble bees (Genus Bombus)

Bumble bees

Bumble bees are important pollinators of many wildflowers and garden plants, helping ecosystems and food crops reproduce.

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Dance flies (Family Empididae)

Dance flies

Many visit flowers for nectar and can move pollen between blooms while also playing important roles in local food webs.

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Flower flies / hoverflies

Adults visit flowers for nectar and pollen, and many species’ larvae help keep plant-eating pests in check.

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Geometer moths (Family Geometridae)

Geometer moths

Adults can help move pollen as they nectar at flowers, and their caterpillars are an important part of local food webs.

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Hawk / sphinx moths (Family Sphingidae)

Hawk / sphinx moths

They can move pollen between flowers while feeding on nectar, especially for blooms that open or scent up in the evening.

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Small nectar moths (micro-moths) (Multiple families (varies))

Small nectar moths (micro-moths)

Many small moths move pollen while feeding on nectar, supporting wild plants and garden blooms—especially in the evening and at night.

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Soldier flies (Family Stratiomyidae)

Soldier flies

Many adults visit flowers for nectar and can move pollen between blooms while feeding.

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Whites & sulphurs (Family Pieridae)

Whites & sulphurs

They visit a wide range of flowers for nectar and can help move pollen between blooms as they feed.

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