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Houstonia longifolia

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Plant types and subtypes: Perennials

Light Requirements: sun, part-sun, part-shade

Water Use: low

Soil Moisture: dry, moist

Soil Description: neutral, average, poor, sand, gravel/rock

Height: 4"-10"

Bloom Time: June, July, August, September

Bloom Color: white, purple, pink, lilac, lavender, blue

Leaf Color: green

Hardiness Zone: 3, 4, 5, 6, 7, 8

Additional Tags: attracts bees, clumping, colonizing, drought tolerant, naturalizing, rock garden plant, stream margin plant

Houstonia longifolia (longleaf summer bluet)
  • Houstonia longifolia (longleaf summer bluet)
  • Houstonia longifolia (longleaf summer bluet)
  • Houstonia longifolia (longleaf summer bluet)

Pricing & Availability

Description

Houstonia longifolia

Also known as:

longleaf summer bluet

,

long-leaved bluets

,

longleaf summer bluet

,

pale bluets

Scientific Synonyms:

Hedyotis longifolia var. tenuifolia, Hedyotis nuttalliana, Hedyotis purpurea var. longifolia, Hedyotis purpurea var. tenuifolia, Houstonia longifolia var. compacta, Houstonia longifolia var. glabra, Houstonia longifolia var. tenuifolia, Houstonia purpurea var. tenuifolia

Description

Houstonia longifolia is a delicate and graceful species. The leaves are elongated (as indicated in the name), about 1 1/4" long by 1/4" wide. In summer, it produces large amounts of dainty, hairy, pale pink flowers that are a mere 1/4" across. These are born in clusters of two or three, atop 10" stems that are often branched.

Cultivation

Longleaf summer bluet is easy to grow and adaptable. It prefers full sun, dry conditions, and thrives in poor, even rocky soil, making it an ideal choice for rock gardens. Its native range includes diverse habitats such as floodplains and stream margins, meadows, rocky ledges and open woodlands. The bloom period extends for a month in summer. A very hardy species. Zones 3-8

Propagation

Divide in early spring or fall. Collected seeds may be sown immediately. If stored, they will require a period of stratification before planting in spring. Seedlings will bloom the second year after germination.

Additional Notes

Though small, this species of bluet is medium-sized within the genus.

Native Range & Classification

Recorded County Distribution: USDA data

Native Range:
AL, AR, CT, DC, FL, GA, IL, IN, KS, KY, MA, MD, ME, MI, MN, MO, MS, NC, ND, NH, NJ, NY, OH, OK, PA, RI, SC, TN, VA, VT, WI, WV

USDA Endangered Status:

  • Endangered: CT, MA
  • Historical: RI
  • Special Concern: ME

Classification

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 longifolia longleaf summer bluet