Clematis is a popular flowering vine that grows profusely, covering fences or trellises. Clematis comes in many species, with an astonishing number of different flower colors. The shapes of the flowers vary too, but the best-known clematis have large, pink or purple star-shaped blossoms. The yellow clematis is less common, but is sought out for its delicate, cheerful color. Its color may shift from one season to the next, varying from white to cream-colored or brighter yellows.
The Bill MacKenzie yellow clematis is a favorite among the several yellow clematis species because its blooms are so vivid. As buds, its flowers resemble small paper lanterns. As they open, they become parachutes, reaching up to 3 inches in width. This vine can reach up to 20 feet in height. The MacKenzie does not reseed. Some growers leave the silver seed heads in place to use in holiday floral arrangements. This clematis holds its green leaves through November. It will bloom through summer and into fall.
The Tibetana yellow clematis is well suited to sunny or partially-shaded areas of the garden and its bright blooms will first appear in July, continuing until late autumn. The Tibetana is unique among yellow clematis for its greater tolerance for drought. It can reach up to 15 or 20 feet in height.
Tangutica is a popular yellow clematis also known as the "Golden Tiara" for its vivid golden yellow flowers that resemble bells. Once the blossom fully opens, it reveals crimson filaments. This species produces a lot of blooms from mid-summer through late fall. Its leaves are unique because their green is darker than most clematis foliage. Tangutica is native to China. Use its seed heads in decorative arrangements.
Clematis likes to be planted in rich, shaded, well-drained soil, but they can also handle full sun as long as their roots are shaded. Plant the root ball 3 inches below ground. Clematis can propagate by being divided or from cuttings in the spring. Softwood cuttings can be rooted in spring; plant semi-ripe ones in early summer.