A covering of sharp sand helps the plant to survive wet winters. Plants can also be mulched with organic matter in the autumn in order to give them extra protection throught the winter; mulch must be removed in the spring to discourage the new growth from rotting. Some protection should be given to the young shoots in spring in areas subject to late frosts. Do not water plants after they have flowered. Plants resent root disturbance and so should be placed in their final positions as soon as possible. Plants require some cold stratification in winter in order to flower well in the following summer. Protect plants from strong winds.
Zones 5 - 8
