Pruning Clematis: Clematis is called the queen of climbing vines, but her highness needs a yearly pruning to bestow those masses of flowers. i've stunted a few by pruning incorrectly. From Organic Gardening
Few vines offer the versatility of climbing clematis. Choose from varieties that bloom in spring (such as Clematis alpina) or fall (C. terniflora) -- or anytime in between. Clematis bloom in virtually every color species such as C.