QuestionsHow to growGreenhouse GrowingOrnamental PlantsColeus Canina plant 0 Vote Up Vote Down Barbara Drewett asked 15 years ago Have you ever heard of this plant and does it work, its supposed to deter cats and dogs as they dislike the smell of the plant. Do most garden centres sell it? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago Coleus canina or Plectranthus caninus is sold for this purpose and some day it works and some say it does not. It is a tender plant, not frst hardy, and therefore must be in a greenhouse or indoors in winter.