Originally Posted by strange_wings
Spider plants are incredibly easy to grow, but you'll have to hang them up. Since they're grass like cats love them.
Luckily they're not poisonous if the cats do decide to sample.
Mine munch on them so much the spider plants have their own room. And the kitties have their "own" spider plant they are allowed to eat. The spiders propagate at such a rate that even if they were to kill them all off, I'd have so many seedlings it wouldn't matter... OH mine also adore marjoram. I don't know if it'll harm them (I doubt it, but still) so it's going in the kitty-safe room for the winter. They hate my mint and my thyme, so those might be good choices. Besides, the peppermint smells delicious and has exploding growth, so even if they did get at it I think you're safe.
All Orchids are safe, and I have managed to keep one alive for a month, so they'd be a safe bet. Nursery orchids are the best to get, though, as you can get great information from people who know what they are talking about.
ALL Lilies I have heard are toxic, and the Peace Lily is on the CFA list as toxic.....
As it is, I have several poisonous plants in my house (Asparagus Fern, Aloe Vera, a horde of African Vi's, etc etc) and the kitties don't bother them. When the asparagus fern was a baby, Emma and Chili loved eating it, and I never knew what it was then, so of course I didn't know it was poisonous--yes, it was dumb--but thankfully they only nibbled and never got sick. Now they leave it alone, they have absolutely no interest in it. The Vi's they never touch, period. They loathe them. The Aloe they were curious about but don't like either.. so I think if your kitties aren't overly interested and you don't have the plants in accessible places, you're good. On top of the fridge, hanging baskets, that sort of thing is good unless you have acrobats.