North America Native Plant

Common Stickyseed

Botanical name: Blennosperma nanum var. nanum

USDA symbol: BLNAN

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Common Stickyseed: A Tiny Treasure for Vernal Pool Gardens If you’re passionate about California’s unique ecosystems and looking to recreate one of the state’s most fascinating seasonal habitats in your garden, meet common stickyseed (Blennosperma nanum var. nanum). This diminutive annual wildflower might not win any awards for size, but ...

Common Stickyseed: A Tiny Treasure for Vernal Pool Gardens

If you’re passionate about California’s unique ecosystems and looking to recreate one of the state’s most fascinating seasonal habitats in your garden, meet common stickyseed (Blennosperma nanum var. nanum). This diminutive annual wildflower might not win any awards for size, but it’s absolutely essential for anyone interested in authentic vernal pool gardening.

What Makes Common Stickyseed Special?

Common stickyseed is a true California native, belonging to the sunflower family and perfectly adapted to one of the state’s most specialized ecosystems. As an annual plant, it completes its entire life cycle in one growing season, timing its growth to match California’s Mediterranean climate patterns.

This little plant produces cheerful yellow composite flowers that may be small in stature but pack a big punch when it comes to supporting local wildlife. The blooms provide crucial nectar sources for native bees and other pollinators during the spring months when vernal pools are at their most active.

Where You’ll Find It Growing Wild

Common stickyseed calls California home, where it thrives in the state’s famous vernal pools and seasonal wetlands. These temporary pools fill with winter rains and slowly dry out through spring and summer, creating a unique wet-to-dry cycle that supports incredibly specialized plant communities.

Why Grow Common Stickyseed?

This plant is perfect for gardeners who want to:

  • Create authentic California vernal pool habitat
  • Support native pollinators with early spring blooms
  • Participate in conservation of rare ecosystem types
  • Add seasonal interest to rain gardens or seasonal wetland areas
  • Grow plants that are truly adapted to California’s climate patterns

Growing Conditions and Care

Here’s where common stickyseed gets interesting – and challenging. This isn’t your typical garden annual. It requires very specific conditions that mimic its natural vernal pool habitat:

Seasonal Water Cycle: The most critical requirement is recreating the natural wet-dry cycle. Plants need several months of standing water or saturated soil during winter and spring, followed by complete drying in summer.

Soil Requirements: Heavy clay soils that hold water are essential. Sandy or well-draining soils won’t work for this specialized plant.

Climate Zones: Thrives in USDA zones 8-10, matching California’s Mediterranean climate patterns.

Planting and Establishment

Successfully growing common stickyseed requires patience and the right setup:

  • Direct seed in fall before winter rains begin
  • Seeds need the natural stratification that comes with winter weather
  • Plant in areas that will flood naturally or can be artificially flooded
  • Ensure your site can dry completely by late spring/early summer
  • Be patient – this plant follows nature’s timeline, not ours

The Reality Check

Let’s be honest – common stickyseed isn’t for everyone. If you’re looking for a low-maintenance annual for your flower beds, this probably isn’t your plant. But if you’re fascinated by California’s unique ecosystems and want to create something truly special, few plants offer the authentic experience that common stickyseed provides.

This plant is best suited for dedicated native plant enthusiasts, restoration projects, or specialized vernal pool gardens. It requires a significant commitment to recreating very specific growing conditions, but the reward is participating in the conservation of one of California’s most threatened habitat types.

Supporting California’s Natural Heritage

By growing common stickyseed, you’re not just adding another plant to your garden – you’re helping preserve the genetic diversity and ecological relationships of California’s remarkable vernal pool ecosystems. These seasonal wetlands have been greatly reduced throughout the state, making every effort to recreate and maintain them incredibly valuable.

Whether you’re planning a rain garden with seasonal flooding, participating in habitat restoration, or simply want to grow something that connects you deeply to California’s natural heritage, common stickyseed offers an authentic and meaningful gardening experience. Just be prepared to work with nature’s schedule rather than your own!

Common Stickyseed

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

Blennosperma Less. - stickyseed

Species

Blennosperma nanum (Hook.) S.F. Blake - common stickyseed

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