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Houstonia serpyllifolia
Thyme-leaf Mountain Bluet
Zone 5 to Zone 9
Plant Shapes: Carpet

Native to the Eastern USA, this woodland species forms a low carpet of tiny evergreen leaves. Loads of little star-shaped soft-blue flowers are produced in midsummer, each with a tiny yellow eye. Truly charming, this looks beautiful in a shady rock garden, as a small area groundcover or growing between flagstones. Nice in an alpine trough or in a rock wall. Grows best in moist soils rich in organic matter. Stems will root along the ground to form new plants, which can be easily dug up and moved during the spring.

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Conditions     Appearance    
Sun Exposure
  Partial Shade
  Full Shade

Soil Type

Soil pH

Soil Moisture

Care Level

Foot Traffic

Rate of Spread
Flower Colour
  Light Blue

Blooming Time
  Late Summer
  Mid Summer

Foliage Color
  Deep Green

Plant Characteristics
  Lawn Substitute
  Between Flagstones
  Ground Cover
  Wild Flower

Flower Head Size
  Very Small

   5-7 cm
   2-3 inches

   30-45 cm
   12-18 inches

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