Tradescantia tharpii (Dwarf Spiderwort)

Also known as Tharp’s spiderwort.

Dwarf Spiderwort is a low-growing perennial with three-petaled flowers that can be purple, blue or pink.  It forms a dense mound of green foliage. It blooms in early spring and re-blooms periodically in the summer.  It grows best in well-drained sandy loam or clay loam soils as long as the drainage is good. It can go dormant in the summer as a natural defense against the heat. It attracts honeybees and bumblebees.

Dwarf Spiderwort is a great addition to a rock garden or perennial border.