Clematis is a large, showy flowering vine that grows in USDA Plant Hardiness Zones 3 through 9, though not all varieties will grow in all zones. However, with more than 300 varieties, there is a clematis for every taste and location.
Many varieties of clematis are large vines that can grow as high as 12 to 15 feet, with some, like the sweet autumn clematis (Clematis terniflora) growing as much as 30 feet high.
Clematis does best in a well-drained, cool location. The plant should receive afternoon shade. It will not thrive in hot weather. Overly wet soil can cause root problems, resulting in the death of the vine.
Clematis can grow on almost any type of trellis. Because some varieties of this plant get so large, sturdy support is essential. Provide a firmly anchored, well-built trellis. You can also use trees and walls as trellises or trellis supports.