Answer by
naputnam (454)
Anise, Bergamot, Castor, Citronella, Lemongrass, Marigolds, Mint such as spearmint, and citrus are repelling to dogs (and cats too, for the most part). If you do not have room or warm enough weather for citrus, the various rinds could be sprinkled in the garden, where they will make compost after their aromatic oils are spent.