I've used Ssscat in the past. Works great.

https://www.amazon.com/PetSafe-PDT00-13914-SSSCAT-Spray-Deterrent/dp/B000RIA95G

My late cat "The Honey" used to chomp on leaves of plants. I tried spraying around the area a citrus spray (cats aren't supposed to like that smell). It did not work. When I confronted her about what she had done, she replied, "Eh." They were my ex-roommate's plants, and when he moved out, the problem was gone. I will check out the recommended product if I get another cat who is interested in plants. I don't have any live plants now, but I may get some later. I've heard cats in the wild eat grass and plants. Supposed to help with digestion? But some plants are poisonous to cats, like poinsettas(sp?) and Easter lilies.

Schoolhouse I just ordered the Cat Scat from Gardener's Supply it looks perfect thank you.

Does Cat Scat work for Christmas trees? :/

Several years ago I was cat sitting a friend's cat while they were on vacation. The cat decided my very large floor plant was an ideal litter pan. I pushed cocktail picks into the soil and that solved the problem.

Lucille, I think your cat will just thank you big time for that great crinkly aluminum that makes such a fun noise for her when she jumps up on the table to check out the plants. I know my (dearly departed) cats would.

June is my first cat ever... she rescued me at animal shelter was a tiny kitten. it didn't take long for her to get interested in a few large house plants. i crinkled up a wreath of foil to lay on top of soil and she wanted nothing further to do with the plants. doubt she ever actually used planters as litter box so no reason to really want to use them??

The only thing that kept my two cats out of my xmas tree was a 4 foot fence around it. It was the result of being at my wits end one night when nothing else worked and I was not willing to take my tree down. I had to stand my ground with them lol. All the things that cats supposedly hate, mine loved. It was a green netting type fence so at least it blended with the tree lol. Thankfully they have outgrown their curiosity for xmas trees and ornaments.

Whenever my two hear me unroll tin foil, they come running and think it's time to play.

My two kittens play with balls made out of tinfoil and love that crinkly sound. Years ago our cats wanted to use the diningroom table legs as scratching posts rather than using the regular scratching posts so we wrapped the legs in tinfoil which deterred them. Looked terrible, but worked. What works for one cat may not work for another.

Aluminum foil didn't work for me either. What did work was cutting up an old plastic chair mat that would have gone into the garbage. I put pieces of it (spiky side up) around some plants and the dears found out very quickly that they did NOT want to go near them.

Crinkled foil is a magnet for our cats. They love the sound of it.

The cat I have now likes to chew on foil but each is different. My first thought though, is since you don't have problems with it on the table why worry about it until you see if it's an issue? Much also depends on how the cat is trained, its curiosity and such. I use a squirt gun when he goes near where he shouldn't and a harsh NO! or two with it, he gets the idea. After a couple squirts the "NO!" is all that's needed.

Another option is put a container of vinegar next to it A flat container with plastic on top with holes poked so the smell will permeate a bit is usually all that's needed. Haven't found a cat yet who likes the smell of vinegar and it will remove odors in the room at the same time.

Just a word of caution, foil is dangerous to cats if swallowed, as it can perforate the stomach.

I was told that putting aluminum foil over a door the cats scratched would deter them. I put it up. Got home that next night... it had all been shredded into tinsel. Nope. I'd not count on it.

And I spent the rest of that evening collecting the residue so they wouldn't eat it.