Shop evergreen clematis (l4690) in the vines section of Lowes.com One of the easiest-to-grow of all clematis, these flowers open in early spring in colours ranging from pinks to red, and all have the most delicious perfume reminiscent of sweet marshmallows. Seeds â¦ The British Clematis Society (BCS) suggests essentially the same procure as ICS. Evergreen Clematis Plants found in: Clematis urophylla 'Winter Beauty', Clematis 'New Love', Clematis napaulensis, Clematis 'Miss Bateman', Clematis x.. I have had fairly extensive experience germinating perennials, shrubs and trees from seed but have had limited experience with clematisâ¦ Blooming from midwinter onward, these very early flowering Clematis â¦ It is not clear if they feel stratification is required. You can start new plants from either collected seeds from an existing vine or from nursery-purchased seeds. Depending on the variety, the clematis will live for 25 years or more and may produce up to 100 blooms over the growing season. The earliest Clematis to flower, the Evergreen group includes small-flowering clematis which provide gardeners with some of the greatest pleasures in winter. Seed propagation takes the longest amount of time. This seed â¦ They put the pots in a âcold greenhouseâ without defining what that means.