North America Native Plant

Smallflower Bluecurls

Botanical name: Trichostema micranthum

USDA symbol: TRMI3

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Smallflower Bluecurls: A Delicate Native Annual for Southwest Gardens If you’re looking to add some understated charm to your native plant garden, smallflower bluecurls (Trichostema micranthum) might just be the perfect little gem you’ve been searching for. This petite annual wildflower brings subtle beauty and important ecological benefits to gardens ...

Smallflower Bluecurls: A Delicate Native Annual for Southwest Gardens

If you’re looking to add some understated charm to your native plant garden, smallflower bluecurls (Trichostema micranthum) might just be the perfect little gem you’ve been searching for. This petite annual wildflower brings subtle beauty and important ecological benefits to gardens across the American Southwest.

What Makes Smallflower Bluecurls Special?

Smallflower bluecurls is a native annual forb that belongs to the mint family, though don’t expect the robust presence of its culinary cousins. This delicate wildflower is all about quiet elegance, producing small blue to purple flowers that cluster along slender stems. As an herbaceous plant, it lacks woody tissue and completes its entire life cycle in a single growing season, making it a charming addition to wildflower meadows and naturalized areas.

Where Does It Call Home?

This southwestern native has made itself at home across Arizona and California, where it thrives in the region’s unique climate conditions. Being native to the lower 48 states, it’s perfectly adapted to the challenges of southwestern gardening, from intense sun to variable rainfall patterns.

Why Grow Smallflower Bluecurls?

There are several compelling reasons to consider adding this native annual to your garden:

  • Pollinator magnet: Despite its small stature, smallflower bluecurls attracts native bees, butterflies, and other beneficial insects
  • Low maintenance: As a native plant, it requires minimal care once established
  • Water-wise: Perfectly suited for drought-tolerant landscaping
  • Natural beauty: Adds delicate texture and color to wildflower gardens
  • Ecological value: Supports local wildlife and contributes to biodiversity

Perfect Garden Settings

Smallflower bluecurls shines in several garden types:

  • Native plant gardens
  • Desert and xeriscape landscapes
  • Wildflower meadows
  • Naturalized areas
  • Pollinator gardens

Its facultative wetland status means it can adapt to both moist and dry conditions, though it typically prefers the drier side of things in garden settings.

Growing Conditions and Care

One of the best things about smallflower bluecurls is how easy it is to please. Here’s what this little native prefers:

  • Sunlight: Full sun to partial shade
  • Soil: Well-draining soils (it’s not picky about soil type)
  • Water: Low water requirements once established
  • Climate zones: USDA hardiness zones 8-10

Planting and Care Tips

Growing smallflower bluecurls is refreshingly straightforward:

  • Timing: Direct seed in fall or early spring for best results
  • Spacing: Scatter seeds in naturalized areas or plant in small clusters
  • Watering: Water gently until established, then rely on natural rainfall
  • Maintenance: Minimal care needed – let it do its thing naturally
  • Reseeding: Allow some plants to go to seed for natural reseeding

The Bottom Line

Smallflower bluecurls may not be the showiest plant in your garden, but it more than makes up for it with ecological value and effortless charm. If you garden in Arizona or California and want to support native wildlife while adding delicate beauty to your landscape, this little annual deserves a spot in your garden. It’s proof that sometimes the smallest plants can make the biggest difference for local ecosystems.

Just remember to source your seeds responsibly from reputable native plant suppliers to ensure you’re getting true smallflower bluecurls that will thrive in your specific location. Happy gardening!

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" matching plants to their ideal growing conditions, so they'll thrive with less work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Arid West

FAC

Facultative - Plants with this status can occur in wetlands and non-wetlands

Smallflower Bluecurls

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

Lamiaceae Martinov - Mint family

Genus

Trichostema L. - bluecurls

Species

Trichostema micranthum A. Gray - smallflower bluecurls

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