Clematis were born to climb. This particular Clematis is called `Nelly Moser`. They are mainly of Chinese and Japanese origin. They are among the most popular of all garden plants. The standard Clematis form a large blossom with 6-7 petals. They are a vigorous vine and can grow 10-20 feet so you need a large space and good support. It can take several years for a Clematis vine to fully mature and begin flowering vigorously. They must have at least six hours a day full sun with partial shade. They need well drained soil. If properly cared for they will add beauty to any garden for many years.