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North America Native Plant

Annual Agoseris

Annual Agoseris: A Charming Native Wildflower for West Coast Gardens If you’re looking to add a touch of wild beauty to your Pacific Coast garden, annual agoseris (Agoseris heterophylla var. crenulata) might just be the perfect little wildflower you’ve been seeking. This delightful native plant brings the charm of natural ...

Annual Agoseris: A Charming Native Wildflower for West Coast Gardens

If you’re looking to add a touch of wild beauty to your Pacific Coast garden, annual agoseris (Agoseris heterophylla var. crenulata) might just be the perfect little wildflower you’ve been seeking. This delightful native plant brings the charm of natural meadows right to your backyard, complete with cheerful yellow blooms that’ll make both you and local pollinators smile.

What Makes Annual Agoseris Special?

Annual agoseris is a true West Coast native, naturally occurring in California and Oregon. As its name suggests, this is an annual plant, meaning it completes its entire life cycle in one growing season. But don’t let that fool you into thinking it’s high-maintenance – this little beauty is actually quite the opposite!

This charming wildflower grows as a forb, which is simply a fancy way of saying it’s a non-woody flowering plant. Picture a low-growing rosette of leaves hugging the ground, topped with bright yellow flowers that look remarkably similar to dandelions (but much more welcome in the garden!).

Why You’ll Love Growing Annual Agoseris

There are plenty of reasons to fall in love with this native gem:

  • Pollinator magnet: Those sunny yellow flowers are like little beacon calls to bees, butterflies, and other beneficial insects
  • Low maintenance: Once established, it’s quite drought-tolerant and requires minimal fussing
  • Native benefits: Supporting local ecosystems while reducing water usage – it’s a win-win!
  • Natural reseeding: Annual agoseris readily self-seeds, ensuring you’ll have blooms year after year
  • Wildflower charm: Perfect for creating that effortless, naturalized look in your landscape

Where Annual Agoseris Thrives

This adaptable native does best in USDA hardiness zones 8-10, making it perfect for most of California and Oregon’s climate conditions. Annual agoseris loves well-draining soils and performs beautifully in full sun to partial shade locations.

It’s particularly well-suited for:

  • Native plant gardens
  • Wildflower meadows
  • Naturalized landscape areas
  • Low-water gardens
  • Pollinator gardens

How to Grow Annual Agoseris Successfully

Growing annual agoseris is refreshingly straightforward, especially if you work with its natural tendencies rather than against them.

Planting: The best time to sow seeds is in fall, allowing the natural winter rains to help with germination. Simply scatter seeds directly where you want them to grow – no need for complicated transplanting!

Soil requirements: While not particularly picky, annual agoseris does prefer well-draining soil. Heavy clay or constantly wet conditions aren’t ideal for this drought-adapted native.

Watering: Once established, this plant is quite drought-tolerant. During its first growing season, provide occasional water during dry spells, but avoid overwatering.

Care tips: The beauty of annual agoseris lies in its simplicity. Allow plants to go to seed naturally, and you’ll likely see new plants emerge the following year. No fertilizer needed – in fact, too-rich soil can actually reduce flowering!

Perfect for Natural Landscapes

Annual agoseris truly shines in natural, low-maintenance landscape designs. Its compact, ground-hugging form makes it an excellent choice for filling in spaces between larger native plants or creating drifts of color in wildflower meadows.

Consider pairing it with other California and Oregon natives like lupines, poppies, or native grasses for a stunning display that changes with the seasons while supporting local wildlife.

A Small Plant with Big Benefits

While annual agoseris might be small in stature, it packs a big punch when it comes to ecological benefits. By choosing this native wildflower, you’re not just adding beauty to your garden – you’re creating habitat for pollinators and supporting the natural heritage of the Pacific Coast.

Whether you’re just starting your native plant journey or you’re a seasoned wildflower enthusiast, annual agoseris offers an easy, rewarding way to connect your garden with the natural world around you.

Annual Agoseris

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

Asterales

Family

Asteraceae Bercht. & J. Presl - Aster family

Genus

Agoseris Raf. - agoseris

Species

Agoseris heterophylla (Nutt.) Greene - annual agoseris

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