Photo by Melody

PlantFiles: Tiny Bluet, Least Bluet
Houstonia pusilla

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Family: Rubiaceae
Genus: Houstonia (hoos-TOH-nee-uh) (Info)
Species: pusilla (pus-ILL-uh) (Info)

Synonym:Hedyotis caerulea var. minima
Synonym:Hedyotis caerulea var. minor
Synonym:Hedyotis crassifolia
Synonym:Houstonia minima
Synonym:Houstonia patens

One member has or wants this plant for trade.

Category:
Annuals
Groundcovers

Height:
under 6 in. (15 cm)

Spacing:
3-6 in. (7-15 cm)

Hardiness:
USDA Zone 3b: to -37.2 C (-35 F)
USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:
Full Sun

Danger:
N/A

Bloom Color:
Light Blue
Medium Blue
Blue-Violet
White/Near White

Bloom Time:
Mid Spring
Late Spring/Early Summer

Foliage:
Herbaceous

Other details:
May be a noxious weed or invasive
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)

Patent Information:
Non-patented

Propagation Methods:
From seed; direct sow outdoors in fall

Seed Collecting:
Collect seedhead/pod when flowers fade; allow to dry

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to view:

By Toxicodendron
Thumbnail #1 of Houstonia pusilla by Toxicodendron

By melody
Thumbnail #2 of Houstonia pusilla by melody

By melody
Thumbnail #3 of Houstonia pusilla by melody

By creekwalker
Thumbnail #4 of Houstonia pusilla by creekwalker

By peachespickett
Thumbnail #5 of Houstonia pusilla by peachespickett

Profile:

1 positive
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive melody On Mar 29, 2005, melody from Benton, KY (Zone 7a) wrote:

A cheerful little wildflower that appears in early Spring here in West KY. It favors close cut lawns and will form large colonies where the grass is thin.

A thick lawn isn't one of it's favorite habitats and it will be most common where the ground has been disturbed and turf hasn't filled in.

Common on sunny slopes and in moist areas.

Regional...

This plant has been said to grow in the following regions:

Lucedale, Mississippi
Cole Camp, Missouri
Longview, Texas



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