North America Native Plant

Hasse’s Vetch

Botanical name: Vicia hassei

USDA symbol: VIHA3

Life cycle: annual

Habit: vine

Native status: Native to the lower 48 states  

Synonyms: Vicia exigua Nutt. var. californica Torr. (VIEXC)  âš˜  Vicia exigua Nutt. var. hassei (S. Watson) Jeps. (VIEXH)   

Hasse’s Vetch: A Charming Native Annual for West Coast Gardens If you’re looking for a low-maintenance native plant that brings delicate beauty and ecological value to your garden, meet Hasse’s vetch (Vicia hassei). This charming annual might not be the showiest plant in your garden, but it’s definitely one of ...

Hasse’s Vetch: A Charming Native Annual for West Coast Gardens

If you’re looking for a low-maintenance native plant that brings delicate beauty and ecological value to your garden, meet Hasse’s vetch (Vicia hassei). This charming annual might not be the showiest plant in your garden, but it’s definitely one of the hardest working – and it asks for almost nothing in return!

What is Hasse’s Vetch?

Hasse’s vetch is a native annual forb that belongs to the pea family. As an herbaceous plant, it doesn’t develop woody stems but instead produces soft, green growth that completes its entire life cycle within a single growing season. Don’t let its modest appearance fool you – this little powerhouse packs a lot of ecological punch into its compact frame.

Where Does It Call Home?

This West Coast native has made itself at home in California and Oregon, where it thrives in the region’s Mediterranean-like climate. As a true native of the lower 48 states, Hasse’s vetch has been part of local ecosystems for thousands of years, making it perfectly adapted to regional growing conditions.

Garden Appeal and Growing Habits

Hasse’s vetch produces small but charming purple to pink pea-like flowers that add subtle color to any planting scheme. Its delicate compound leaves create a fine-textured backdrop, and the plant has a naturally trailing or climbing habit that makes it perfect for weaving through other plants or cascading over edges.

As an annual, this vetch completes its entire life cycle in one year, which means you’ll get to enjoy the anticipation of seeing where it pops up next season (if you let it self-seed, that is!).

Perfect Garden Roles

Hasse’s vetch shines in several garden situations:

  • Native plant gardens: An authentic addition to California and Oregon native landscapes
  • Wildflower meadows: Adds delicate texture and subtle color
  • Restoration projects: Helps rebuild native plant communities
  • Ground cover: Provides gentle coverage in naturalized areas
  • Wildlife habitat gardens: Supports local pollinators and beneficial insects

Growing Conditions

One of the best things about Hasse’s vetch is how easy-going it is. This plant thrives in:

  • Sunlight: Full sun to partial shade
  • Soil: Well-drained soils of various types
  • Water: Drought tolerant once established, though appreciates some moisture during germination
  • Climate: USDA hardiness zones 8-10

Planting and Care Tips

Growing Hasse’s vetch is refreshingly straightforward:

  • When to plant: Direct seed in fall for spring growth
  • Soil prep: Minimal – just ensure good drainage
  • Spacing: Scatter seeds naturally for a wild look
  • Watering: Water lightly until seeds germinate, then reduce frequency
  • Maintenance: Practically none! Let it do its thing

The beauty of this native annual is that it often self-seeds, creating delightful surprises in your garden year after year. If you want more control over placement, simply collect seeds when the pods dry and scatter them where you’d like new plants.

Wildlife and Pollinator Benefits

Hasse’s vetch is a pollinator magnet, attracting bees and other beneficial insects with its nectar-rich flowers. As a member of the legume family, it also has the superpower of fixing nitrogen in the soil, actually improving growing conditions for neighboring plants. Talk about being a good neighbor!

Why Choose Hasse’s Vetch?

This native vetch is perfect for gardeners who want to:

  • Support local ecosystems with authentic native plants
  • Enjoy beautiful flowers without high maintenance
  • Create habitat for pollinators and beneficial insects
  • Add subtle texture and movement to garden beds
  • Improve soil health naturally through nitrogen fixation

The Bottom Line

Hasse’s vetch might not win any flashy flower contests, but it’s exactly the kind of plant that makes a garden feel alive and connected to its place. It’s the botanical equivalent of a reliable friend – always there when you need it, never demanding attention, and quietly making everything around it better. For West Coast gardeners looking to embrace their region’s native flora while creating pollinator habitat, Hasse’s vetch deserves a spot in your seed mix!

Hasse’s Vetch

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Fabales

Family

Fabaceae Lindl. - Pea family

Genus

Vicia L. - vetch

Species

Vicia hassei S. Watson - Hasse's vetch

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