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.
From Japan. Possibly the hardiest of the banana clan. Grows to 15 ft. tall, with narrow green leaves a...
Hybrid between P. caerulea and P. alata. Among the best-known, most widely planted p...
More open and sprawling than P. aequalis, with loose clusters of orange to red flowers. ...