Vinca Flower Sun Or Shade. An exception is Catharanthus. Because of its uniform growth and compact size it makes an ideal edging or annual groundcover.
An exception is Catharanthus. Propagate by tearing off a few stems which have rooted. Feb 13 2020 Its foliage will be darkest and the blooms will be most prolific when grown in full sun though it will tolerate some shade.
It will grow in dappled shade.
Soil that will foster fungal disease in Vinca plants will usually be constantly waterlogged. Trailing vinca is wonderful for containers or as ground cover. This vinca comes from Madagascar and thrives in hot sunny locations. Soil that will foster fungal disease in Vinca plants will usually be constantly waterlogged.