Vinca or Periwinkle are slender stemmed evergreen shrubs or perennials which have simple paired leaves and colourful five pettaled flowers. They are spreading plants which only reach around 10cm in height but create a pretty ground cover. Ground cover is the perfect addition to any border as it covers the soil therefore minimising weeds. Vinca are very easy to grow and enjoy dry soil and full sunlight; this will increase flowering. Vinca do not need pruning but they can be cut back occasionally. They can be trimmed in early Spring and should flower again in the same year.