North America Native Plant

Spreading Stickseed

Botanical name: Hackelia diffusa var. diffusa

USDA symbol: HADID

Life cycle: perennial

Habit: forb

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

Synonyms: Hackelia saxatilis (Piper) Brand (HASA4)  âš˜  Lappula diffusa (Lehm.) Greene (LADI7)   

Spreading Stickseed: A Pacific Northwest Native Worth Growing If you’re looking to add a touch of Pacific Northwest charm to your garden with a plant that’s both beautiful and beneficial, let me introduce you to spreading stickseed (Hackelia diffusa var. diffusa). This delightful native perennial might not have the flashiest ...

Rare plant alert!

Region: Conservation status by state

Status: S4T3: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals. ⚘ Apparently Secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the state or more than 10,000 individuals ⚘

Spreading Stickseed: A Pacific Northwest Native Worth Growing

If you’re looking to add a touch of Pacific Northwest charm to your garden with a plant that’s both beautiful and beneficial, let me introduce you to spreading stickseed (Hackelia diffusa var. diffusa). This delightful native perennial might not have the flashiest name, but it’s got character in spades and offers some wonderful benefits for both gardeners and local wildlife.

What is Spreading Stickseed?

Spreading stickseed is a native perennial forb that calls the Pacific Northwest home. As a herbaceous plant, it lacks woody stems but returns reliably year after year from its root system. The plant gets its common name from its somewhat sticky seeds that have a tendency to hitch rides on clothing and animal fur – nature’s clever way of ensuring the species spreads to new locations.

You might also encounter this plant listed under its botanical synonyms, including Hackelia saxatilis or Lappula diffusa, but they all refer to the same charming wildflower.

Where Does It Naturally Grow?

This native beauty is naturally found across the Pacific Northwest, specifically in British Columbia, Washington, and Oregon. It’s perfectly adapted to the unique climate and growing conditions of this region, making it an excellent choice for gardeners wanting to work with nature rather than against it.

Why Consider Growing Spreading Stickseed?

There are several compelling reasons to add this native plant to your garden:

  • Native heritage: As a true Pacific Northwest native, it supports local ecosystems and requires less water and maintenance than non-native alternatives
  • Pollinator magnet: The small, charming blue flowers attract native bees and other beneficial pollinators
  • Low maintenance: Once established, it’s quite drought tolerant and doesn’t need pampering
  • Natural beauty: Delicate clusters of blue flowers add a wildflower charm to any garden
  • Versatile placement: Works well in woodland gardens, naturalized areas, and native plant landscapes

Important Conservation Note

Before you rush out to plant spreading stickseed, there’s something important to know: this plant has a conservation status that suggests it’s somewhat uncommon in its natural range. If you’re interested in growing it, please make sure you source your plants or seeds from reputable native plant nurseries that practice responsible propagation rather than wild collection.

Growing Conditions and Care

The good news is that spreading stickseed is quite adaptable and relatively easy to grow if you can meet its basic needs:

  • Light: Partial shade to full sun (mimicking forest edges in its natural habitat)
  • Soil: Well-drained soils; it’s quite tolerant of rocky or less-than-perfect conditions
  • Water: Moderate water during establishment, then quite drought tolerant
  • Climate: Hardy in USDA zones 5-8, perfect for most Pacific Northwest gardens

Planting and Care Tips

Getting spreading stickseed established in your garden is refreshingly straightforward:

  • Plant in spring or fall when temperatures are moderate
  • Space plants appropriately for their mature size
  • Water regularly during the first growing season to help establish roots
  • Once established, minimal care is needed – this plant prefers a hands-off approach
  • Allow some seeds to mature and self-sow for natural spreading (hence the name!)

Garden Design Ideas

Spreading stickseed shines in several garden settings:

  • Woodland gardens: Perfect for creating naturalized drifts under trees
  • Native plant gardens: Pairs beautifully with other Pacific Northwest natives
  • Rock gardens: Tolerates rocky conditions and adds soft texture
  • Pollinator gardens: Provides nectar for native bees and beneficial insects

The Bottom Line

Spreading stickseed is a wonderful choice for Pacific Northwest gardeners who want to support native ecosystems while adding natural beauty to their landscapes. Its low-maintenance nature, pollinator benefits, and authentic regional character make it a valuable addition to the right garden. Just remember to source it responsibly and give it the well-drained conditions it prefers. With minimal effort from you, this charming native will reward you with years of delicate blue blooms and the satisfaction of knowing you’re supporting local wildlife.

Spreading Stickseed

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Lamiales

Family

Boraginaceae Juss. - Borage family

Genus

Hackelia Opiz - stickseed

Species

Hackelia diffusa (Lehm.) I.M. Johnst. - spreading stickseed

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