Species include a spreading mound and a ground-covering mat. Both are blanketed with broadly cup-shaped blooms in summer. Beyond hardiness range, treat these perennials as annuals.Nierembergia repens
Native to Andean and warm-temperate South America. This species grows as a mat 4 to 6 in. high, 2 ft. wide, with bright green foliage and white blossoms. For best performance, don’t crowd it with more aggressive plants. Not as heat tolerant as Nierembergia linariifolia.
From Japan. Sometimes sold as Liriope gigantea. Grows 2 to 3 ft. tall, 1 to 1 1/2 ft. wide, w...
Hybrid between P. caerulea and P. alata. Among the best-known, most widely planted p...
These grasslike Asian natives are slightly less cold-hardy than their close cousins Liriope. ...