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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