Orders for plugs will ship the week of April 15th.

To request an alternate delivery week, reply to your order confirmation email.

Free shipping on ALL plant orders!

Houstonia serpyllifolia

thymeleaf bluet add to wishlist

Plant types and subtypes: Perennials, Ground Covers

Light Requirements: part-shade, shade

Water Use: medium

Soil Moisture: moist

Soil Description: rich, average

Height: 3"-6"

Bloom Time: May, June

Bloom Color: white, violet, blue

Leaf Color: green

Hardiness Zone: 6, 7

Additional Tags: colonizing, mat-forming, rock garden plant, shade garden plant

Flowers of Houstonia serpyllifolia (thymeleaf bluet)
  • Flowers of Houstonia serpyllifolia (thymeleaf bluet)
  • Flowers of Houstonia serpyllifolia (thymeleaf bluet)
  • Flowers of Houstonia serpyllifolia (thymeleaf bluet)

Pricing & Availability


Houstonia serpyllifolia

Also known as:

thymeleaf bluet




Michaux's bluets


creeping bluets

Scientific Synonyms:

Hedyotis michauxii


This groundcover has tiny, thyme-like leaves. Once established, Houstonia serpyllifolia will create a moss-like, bright green carpet. The diminutive flowers may be white to violet, are made up of four petals and radiate from a yellow center. Established colonies will bloom profusely.


The growing habit of the thymeleaf bluet make it well suited for shade gardens, shaded rock gardens and in front of borders, so long as they are in a cool location where the soil will not be allowed to dry out for extended periods. It can be grown in average soil, but prefers an organically rich, moist environment. Under ideal conditions it will spread indefinitely, yet it is easy to control and is non invasive. It blooms late spring to early summer, May and June. Zones 6-7


Propagate by division in early spring or fall.

Additional Notes

Though thymeleaf bluets create a dense mat, they are not a good weed suppressant.

Native Range & Classification

Recorded County Distribution: USDA data

Native Range:

USDA Endangered Status:

  • Endangered: KY
  • Extirpated: PA


Kingdom Plantae Plants
Subkingdom Tracheobionta Vascular plants
Superdivision Spermatophyta Seed plants
Division Magnoliophyta Flowering plants
Class Magnoliopsida Dicotyledons
Subclass Asteridae
Order Rubiales
Family Rubiaceae Madder family
Genus Houstonia bluet
Species Houstonia serpyllifolia thymeleaf bluet