| Common Name: Tiny Bluet Family name:: Rubiaceae Genus:: houstonia Species:: pusilla Plant type
Annuals
Groundcover
Height
3 - 6 inches Spread
0-3 inches USDA Hardiness Zone
3a = -40 to -35F / -37.3 to -39.9C
3b = -35 to -30F / -34.5 to -37.2C
4a = -30 to -25F / -31.7 to -34.4C
4b = -25 to -20F / -28.9 to -31.6C
5a = -20 to -15F / -26.2 to -28.8C
5b = -15 to -10F / -23.4 to -26.1C
6a = -10 to -5F / -20.6 to -23.3C
6b = -5 to 0F / -17.8 to -20.5C
7a = 0 to 5F / -15.0 to -17.7C
7b = 5 to 10F / -12.3 to -14.9C
8a = 10 to 15F / -9.5 to -12.2C
8b = 15 to 20F / -6.7 to -9.4C
Sun exposure
full sun
Water Needs
moist
Growth rate
average Foliage
Green
Bloom season
early spring
spring
late spring
early summer
Bloom Color
white
light blue
blue
Soil conditions
slightly acidic
Does well in containers?
unknown Invasive?
Yes, Invasive in most zones
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