Lavender also seems cat-friendly, the cats hate the smell of it but they enjoy the shade it offers. This, of course, is anecdotal. Not sure if it is poisonous but I’ve never heard anyone say their cats got sick from it….
Which Smells or Herbs Will Repel Cats
Thank you for the article. There is so much conflicting evidence arround. I am currently undertaking Operation Repel Flea and know that the little blighters hate Lavender EO. I am using Lavender EO in a water spray on the soft furnishings and did use a tiny bit on the cats between the shoulder blades where they are unable to lick. It has improved things slightly.
Lavender: People love the scent, cats avoid it.
Seriously, try a motion sensor alarm that emits a high pitched wail. Or plant lavender, curry plant ("Helichrysum italicum" or "Helichrysum angustifolium")- cats hate these. Or pinecones in the areas where they crap. Or mothballs...there are quite a few options.
Cats be gone ~ Best Cat Repellent Plants | Auntie Dogma's Garden Spot