General Characteristics: Clematis may be planted and trained to cover walls, trellis, posts, fences, arbors or to cover rocky sites. It will need support. Prefers a rich, well-drained soil with a pH of 5.6-6.5. Clematis do best in neutral or slightly alkaline soils, but they are somewhat adaptable. If you have very acid soil, try to add some calcium when you plant. Roots should be planted in a cool moist environment, while the vine itself should be in the sun. Root area should be protected. They require 1" of water a week. 'H. F. Young' is one of the most compact and free-flowering of all the clematis, making it ideal for smaller gardens and growing in containers. Its blue flowers with yellow anthers are produced from late spring to early summer, and again in late summer. By general consent, it is one of the best blue Clematis.
Clematis Repeat Blooming: GROUP B: These are early double and semi-double mid-season cultivars. They bloom mid June and if healthy they will bloom again around September in a smaller show of color. These bloom on the new growth that is produced from old buds produced on stems from the previous season. If they are pruned to the ground, they will bloom, but will miss the big and beautiful early flower period. Remove dead and weak stems in February or March, leaving the best of last year's buds. Once they finish blooming, cut the plant back to 16" to encourage new growth for fall flowering.