Small genus of plants from sunny, moist areas in South America. Species include a spreading mound and a ground-covering mat. Both are blanketed with broadly cup-shaped blooms in summer. Beyond the hardiness range, treat these perennials as annuals.Nierembergia repens
Native to Andean and warm-temperate South America. This species grows as a mat to 4–6 in. high and 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 N. linariifolia.
These grasslike Asian natives are slightly less cold-hardy than their close cousins Liriope. ...
From Japan. Sometimes sold as Liriope gigantea. Grows to 2–3 ft. tall and 1–1 1/2...
From South Africa. Woody-based perennials that die to the ground in cold climates, remain shrubby in m...