Houstonia caerulea
Bluets, Azure Bluet, Quaker Ladies
Family: Rubiaceae Madder
| Type | Perennial |
| USDA Hardiness range | 7A - 8B |
| Exposure | Full shade to partial shade or partial sun |
| Bloom color | Blue, purple, white |
| Bloom time | Late Spring to Early Fall |
| Water needs | Moist |
| Landscape uses | Alpine garden, border, ground cover, rock garden, woodland garden |
| Height | 6" to 8" / 15cm to 20cm |
| Spread | n/a |
| Leaf color | Green |
| Fruit color | n/a |
| Soil pH requirements | Neutral |
| Soil type | Sandy, loamy |
| Form | Upright or erect |
| Attributes and features | Attractive foilage, native to North America |