Coleus caninus (Roth) Vatke (note spelling) is correctly named Plectranthus
caninus Roth.It is a weedy annual species widespread in eastern & southern
Africa and India. There is nothing at all new about the plant and it is no
more a dog repellent than any other foul smelling plant. The allied
perennial Plectranthus neochilus Schlechter would be a better choice because
the foliage smells like a skunk!!!

Marigolds would work just as well.