Show Details. This vigorous climber prefers a … Perfect on a tall support in the border, the flowers are striking against the plant’s lighter green foliage. Botanical Name: Clematis 'Rouge Cardinal' Form: Vine Sun Exposure: Full Sun, Partial Shade Height/Habit: 6 - 10 feet Spread: 36 - 48 inches Spacing: 4 - 6 feet Hardiness Zone: 4-8 Flowering Date: Blooms from early summer to early fall Planting Instructions: GREEN group vining clematis … Add to cart. Brilliant, 4-6", velvet-crimson flowers with brownish-yellow stamens appear in abundance in early summer among dark green, leathery foliage. Clematis Sunset $ 12.99. Clematis … This red Clematis has large, velvety crimson blooms in summer. Clematis Rouge Cardinal quantity. Rouge Cardinal Clematis makes a fine choice for the outdoor landscape, but it is also well-suited for use in outdoor pots and containers. Clematis Ruutel is an important introduction, with bright lipstick red blooms that command attention. Clematis 'Rouge Cardinal' is certainly one of the best red varieties. Because of its spreading habit of growth, it is ideally suited for use as … Clematis prefers cool shaded roots while having its flowering parts of the vine in the sunshine. Single, velvety red flowers with brown anthers are produced from July to September in an opulent display. Pruning type 3. Blooms are borne on present year's growth and repeat throughout … ... Clematis Rouge Cardinal $ 12.99.