Water well in the summer, but avoid waterlogging the roots. Water sparingly in the winter, but avoid letting the plant dry out completely. Tip cuttings taken in the spring. Hybrids may be grown from seed and will bloom the same year if started in the winter. All have softly hairy, lobed leaves and bell-shaped flowers with incurving petals .
Leaves are entire and shallowly lobed.
Flowers are bell-shaped, and white to purple with dark purple veins. Flowers are small, yellow, and pendant, with a large red calyx. Similar to a Japanese maple. Flowers have protruding stamens, with orange-yellow petals that are veined with dark crimson. It is a tall shrub with mauve or white flowers.