Several ground covering plants have been included, since the need for them exist, especially where little else will grow. The ‘Periwinkles’ or Vincas are outstanding in this respect for they can survive in the most inhospitable of places and remain evergreen, although it must be said that they grow best and flower best in half shade where not bone dry. Vincas come in two, V. minor and V. major, and as one would expect the former are smaller in growth. They have also the widest range of colour even if freedom to flower is not one of the strong points of Vincas generally. The freest is the bright blue V.’Bowles
Variety’ and V. atropurpurea is a plum purple shade, of more rapid spread, as has the white V. alba. The variegated leaved are naturally brighter in foliage effect, and both the silvery V. argentea and the golden V. aurea are worth having. V. major hastwice as large as V. minor, but is no quicker to spread. These make less of a carpet, but both the green type and the bright golden-green of V. major variegata are useful and attractive. Old Vincas tear apart quite easily, but are not so easy to plant safely as young pot grown plants.