North America Native Plant

Western Blue Virginsbower

Botanical name: Clematis occidentalis var. occidentalis

USDA symbol: CLOCO

Life cycle: perennial

Habit: vine

Native status: Native to Canada âš˜ Native to the lower 48 states  

Synonyms: Atragene americana Sims (ATAM2)  âš˜  Atragene occidentalis Hornem. (ATOC)  âš˜  Clematis verticillaris DC. (CLVE3)  âš˜  Clematis verticillaris DC. var. cacuminis Fernald (CLVEC2)  âš˜  Clematis verticillaris DC. var. grandiflora B. Boivin (CLVEG)   

Western Blue Virginsbower: A Rare Native Climber Worth Growing Responsibly If you’re looking for a native climbing vine that brings early spring color and supports local wildlife, western blue virginsbower might just be your perfect match. This charming perennial climber, scientifically known as Clematis occidentalis var. occidentalis, offers delicate purple-blue ...

Rare plant alert!

Region: New Jersey

Status: Highlands Listed, S2: New Jersey Highlands region ⚘ Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘

Western Blue Virginsbower: A Rare Native Climber Worth Growing Responsibly

If you’re looking for a native climbing vine that brings early spring color and supports local wildlife, western blue virginsbower might just be your perfect match. This charming perennial climber, scientifically known as Clematis occidentalis var. occidentalis, offers delicate purple-blue flowers and feathery seed heads that add both beauty and ecological value to your garden.

What Makes Western Blue Virginsbower Special

Western blue virginsbower is a true native treasure, naturally occurring across eastern North America from Canada down to the lower 48 states. You’ll find this lovely vine growing wild in places like New Brunswick, Ontario, Quebec, and throughout much of the northeastern and Great Lakes regions, including states from Maine to North Carolina and west to Minnesota and Wisconsin.

This perennial vine has quite the collection of historical names too – botanists have also called it Atragene americana, Atragene occidentalis, and Clematis verticillaris over the years, which just goes to show how long people have been admiring this plant!

A Word of Caution: Rarity Matters

Before we dive into growing tips, there’s something important to know: western blue virginsbower is considered rare in some areas. In New Jersey, for example, it has a rarity status of S2 and is Highlands Listed, meaning it’s imperiled in that state. If you decide to grow this beauty, please make sure you source your plants responsibly from reputable native plant nurseries rather than collecting from the wild.

Garden Appeal and Landscape Role

This twining climber brings a woodland charm that’s hard to beat. In spring, it produces gorgeous bell-shaped flowers in shades of purple and blue that seem to glow in dappled shade. After the flowers fade, the plant develops attractive feathery seed heads that add textural interest well into fall.

Western blue virginsbower works beautifully in:

  • Woodland and shade gardens
  • Natural landscape designs
  • Cottage-style gardens
  • As a climbing accent on trellises, fences, or arbors
  • Naturalized areas where you want to encourage native plant communities

Growing Conditions and Care

This native climber is surprisingly adaptable once you understand its preferences. Western blue virginsbower thrives in USDA hardiness zones 3-7, making it suitable for much of the northern United States and southern Canada.

Here’s what your western blue virginsbower needs to flourish:

  • Light: Partial shade to full shade – it actually prefers some protection from harsh afternoon sun
  • Soil: Moist, well-draining soil with good organic content
  • Root conditions: Cool, mulched roots (this is key to success!)
  • Support: A sturdy trellis, fence, or other climbing structure

Planting and Care Tips

Getting your western blue virginsbower established is pretty straightforward if you follow these guidelines:

  • Plant in spring or early fall when temperatures are moderate
  • Dig a hole twice as wide as the root ball and just as deep
  • Mulch heavily around the base to keep roots cool and moist
  • Provide immediate support – this vine needs something to climb from day one
  • Water regularly during the first growing season to establish strong roots
  • Prune lightly after flowering if needed, but avoid heavy pruning

Wildlife and Pollinator Benefits

As a native plant, western blue virginsbower provides valuable ecosystem services. Its early spring flowers offer nectar when few other plants are blooming, making it especially important for native bees and other pollinators emerging from winter dormancy. The vine also provides nesting sites and cover for small birds and beneficial insects.

Is Western Blue Virginsbower Right for Your Garden?

This native climber is an excellent choice if you:

  • Have a partially shaded spot that needs vertical interest
  • Want to support native pollinators with early spring blooms
  • Appreciate plants with multi-season appeal (flowers in spring, interesting seed heads in fall)
  • Are creating a woodland or natural-style garden
  • Can commit to sourcing plants responsibly due to its rarity in some areas

While western blue virginsbower may require a bit more effort to source responsibly, this native climber rewards gardeners with its delicate beauty, ecological benefits, and the satisfaction of growing a plant that truly belongs in North American landscapes. Just remember – if you’re lucky enough to add this rare gem to your garden, you’re not just growing a plant, you’re helping preserve a piece of our native botanical heritage.

Western Blue Virginsbower

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Magnoliidae

Order

Ranunculales

Family

Ranunculaceae Juss. - Buttercup family

Genus

Clematis L. - leather flower

Species

Clematis occidentalis (Hornem.) DC. - western blue virginsbower

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