The vinca that fights back. Reduced Risk: offers season-long flowering and survival in landscape plantings. Highly resistant to ten of the most virulent isolates of Phytophthora nicotianae that cause Phytophthora blight on annual vinca. 1 Easier to grow: improved branching, uniformity, and floriferousness make Cora XDR ideal for premium packs and small to larger pots. Higher consumer appeal: large showy flowers in the widest range of solid and high-demand bicolor patterns of any disease-resistant vinca on the market. 1 Confirmed in collaboration with Clemson University; these isolates were found at growers and in landscapes across the southern U. S.