Vinca refers to several groups of plants suitable for a number of applications: Vinca minor (Common Periwinkle, Dwarf Periwinkle) and Vinca major (Big-leaf Periwinkle) both make lovely, evergreen groundcovers; Catharanthus roseus (Madagascar Periwinkle) is an upright, flowering annual perfect for beds and containers.
Known for their adaptability and low maintenance, they thrive in heat, humidity, drought, cold, and poor soil, flaunting blooms in shades of white, rose, pink, and red, and flowering from spring to fall, depending on the variety.
Genus name is from Latin meaning to bind or wind around in reference to the long, flexible stems that were used in wreath making. Specific epithet means smaller. The leaves of Vinca minor are smaller than those of Vinca major.
No serious insect problems but vince stem canker (blight) can damage or kill large patches. Can spread aggressively into adjacent lawns or garden areas. Versatile ground cover for shady areas. Good cover for bulbs. Effective on slopes or banks to stabilize soils and prevent erosion.
RE: Vinca - colour for a hot spot.