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Varieties. 1  Clematis (cirrhosa) 'Freckles' - Attractive largish fragrant cream bell shaped flowers (to 2 inches or 5cm) flecked with pink to reddish/brown spots or 'freckles' appear from late summer through to winter. 2  Foliage is a handsome dark green fern like foliage. 3  Clematis cirrhosa var.
Research your clematis to determine the support that would be appropriate for its mature size. Nelly Moser (Clematis Nelly Moser), for instance, has a large mauve flower and reaches only 6 to 10 feet tall with a spread of 1 to 3 feet in U.S. Department of Agriculture plant hardiness zones 4 through 11.weet autumn clematis (Clematis terniflora), on the other hand, has tiny white flowers on aggressive vines that reach 15 feet tall with a spread of up to 6 feet in USDA zones 5 through 11. It requires a sturdy structure such as a fence, wall or pergola.