Hot Pink Tulips on a Vine Clematis Princess Diana is a late flowering variety that produces masses of bright 4 petalled pink blooms from midsummer through fall. The Clematis Princess Diana has unique tulip-shaped flowers each have four petals, with lighter pink margins, and bright yellow anthers. The attractive seed heads are an added bonus in late fall.This vivid tubular flower of hot raspberry pink is a tribute to the late princess. Clematis Princess Diana needs a supporting structure to grow properly.Clematis is easy to grow in a rich, porous, alkaline soil with plenty of room for the roots to spread. Prune lightly above the new leaf buds in early spring and remove any dead or weak stems of the Princess Diana Clematis. Varieties within this group flower on the new season’s growth.Provide shade for the roots to keep ground cool and moist by using mulch or a shallow growing groundcover.* Tulip Shaped Flowers * Hot Raspberry Color* Blooms Mid Summer Through Fall Pruning & Training Clematis.