North America Native Plant

Matted Bluet

Botanical name: Houstonia humifusa

USDA symbol: HOHU

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Hedyotis humifusa A. Gray (HEHU)  âš˜  Oldenlandia humifusa (A. Gray) A. Gray (OLHU)   

Matted Bluet: A Charming Native Groundcover for Southwestern Gardens If you’re looking for a delicate, low-maintenance native plant that brings subtle beauty to your garden, meet the matted bluet (Houstonia humifusa). This little charmer might not be the showiest plant in your garden, but it more than makes up for ...

Matted Bluet: A Charming Native Groundcover for Southwestern Gardens

If you’re looking for a delicate, low-maintenance native plant that brings subtle beauty to your garden, meet the matted bluet (Houstonia humifusa). This little charmer might not be the showiest plant in your garden, but it more than makes up for it with its adaptability, native credentials, and surprising resilience.

What is Matted Bluet?

Matted bluet is a native annual forb that creates lovely carpets of tiny, four-petaled flowers. Despite being an annual, this plant has a knack for self-seeding, often returning year after year in the same spots. The flowers typically range from white to pale blue, and while they’re small individually, they create a charming effect when the plant is in full bloom.

Botanically known as Houstonia humifusa, this plant may also appear in older references under the synonyms Hedyotis humifusa or Oldenlandia humifusa, so don’t be confused if you see these names floating around.

Where Does Matted Bluet Grow Naturally?

This native beauty calls the American Southwest home, naturally occurring in New Mexico, Oklahoma, and Texas. It’s perfectly adapted to the challenging conditions of this region, making it an excellent choice for gardeners in these areas who want to work with nature rather than against it.

Why Consider Matted Bluet for Your Garden?

There are several compelling reasons to give matted bluet a spot in your landscape:

  • Native plant benefits: Supporting local ecosystems and wildlife
  • Low maintenance: Once established, it pretty much takes care of itself
  • Drought tolerance: Perfect for water-wise gardening
  • Pollinator support: Small native bees and beneficial insects appreciate the tiny flowers
  • Self-seeding habit: Acts like a perennial even though it’s technically annual

Best Garden Settings for Matted Bluet

This adaptable little plant works beautifully in several garden styles:

  • Native plant gardens: A perfect fit alongside other regional natives
  • Rock gardens: Thrives in well-drained, rocky conditions
  • Xerophytic gardens: Ideal for drought-tolerant landscapes
  • Naturalized areas: Great for filling in gaps in informal plantings

Growing Conditions and Care

One of the best things about matted bluet is how undemanding it is. Here’s what you need to know:

Soil: Well-drained soils are essential. This plant actually prefers poor to average soils and can struggle in overly rich conditions.

Water: Drought-tolerant once established. In fact, too much water can be problematic.

Sunlight: Prefers full sun but can tolerate partial shade.

USDA Zones: Hardy in zones 7-9, matching its native range.

Planting and Care Tips

Getting started with matted bluet is refreshingly simple:

  • Best planting time: Fall seeding works best, allowing natural winter stratification
  • Seeding: Scatter seeds directly where you want them to grow
  • Spacing: Don’t worry too much about precise spacing – nature will sort it out
  • Maintenance: Minimal care needed once established
  • Self-seeding: Allow some plants to go to seed for next year’s display

A Few Things to Keep in Mind

While matted bluet is generally wonderful, there are a couple of considerations:

As an annual that relies on self-seeding, you might see some variation in where it pops up each year. Some gardeners love this natural randomness, while others prefer more predictable plantings. Also, being a small, delicate plant, it can get overwhelmed by more aggressive species, so it works best in areas where it won’t face too much competition.

The Bottom Line

Matted bluet is one of those quiet garden gems that rewards gardeners who appreciate subtle beauty and natural processes. If you’re gardening in its native range and want a low-maintenance, drought-tolerant groundcover that supports local wildlife, this native annual deserves serious consideration. It might be small, but it’s perfectly formed for its role in Southwestern gardens.

Plus, there’s something deeply satisfying about growing a plant that’s been thriving in your region for thousands of years – it’s like welcoming an old friend into your garden.

Matted Bluet

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

Rubiales

Family

Rubiaceae Juss. - Madder family

Genus

Houstonia L. - bluet

Species

Houstonia humifusa (A. Gray) A. Gray - matted bluet

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