Poncirus is indigenous in northern China and Korea, and comprises only one species which can be left outside in winter if it is properly protected, andprofusely after a warm autumn; the decorative, bare, winter shoots are suitable for cut . P. trifoliata (syn. Citrus trifoliata), Japanese bitter orange, is a deciduous, woody-stemmed shrub with green, thorny, squarish, stout shoots, green which turn yellow and are composed of three leaflets, and fragrant, pure white flowers which appear before the and consist of 4-5 spreading petals; in the autumn it has yellow, orange-like, inedible fruits, 4-5 cm across.
Young specimens should be covered in winter or be planted in tubs and placed in a cool, frost-freefor the winter in a sheltered, warm, sunny spot (under an awning), in normal, well-drained (clay) soil; Pieris ‘Forest Flame’ after flowering. Propagate from (unheated ) or from summer .
Grows to a height of 2-3 m and flowers in late March/early April. It has thin, greyish-brown shoots, oval, bristly-toothed leaves, 3-5 cm long, which turn a beautiful colour in autumn, and countless white flowers with a dark pink calyx and receptacle; there are several low-growing cultivars.
P. lusitanica, Portuguese laurel, is less winter-hardy and evergreen. It grows 3-4 m tall and flowers profusely in June, when it is older. It has shiny, dark green, oval, finely serrated leaves, 7-10 cm long, on dark red, clusters of large, white flowers and black bunches of fruits; it is suitable as foliage to cover walls or as a hedge. Grow in a sheltered, slightly shady spot, in fertile soil, rich in lime and humus; from seed.
P. persica ‘Klara Mayer’, ornamental peach, is an erect, broad shrub or tree up to 5 m.