How do you keep stray cats from using your flower garden as a litter b

https://www.alleycat.org/resources/how-to-live-with-cats-in-your-neighborhood/

I have heard that shredded Irish Spring soap is a good and inexpensive deterrent.

I place sticks in a pattern in my raised bed and cats stopped digging in there. I use bamboo sticks, as I am always having to thin that and have plenty. Any sticks work. I make a criss cross pattern and it looks planned and decorative, much nicer than kitty tootsie rolls.

Cats are deterred by textures more than smells. Anything that would be unpleasant to dig through works best. Sharp things like walnut shells are otherwise harmless. I had a cat who was terrified of aluminum foil and used that to my advantage. If you lay it out for a few days, a stray might just move along to another flower bed. Cats have good memories, so a bad experience can often serve as a long-term deterrent. Just make sure they associate the bad experience with your flower bed, and not with you. They will continue when you aren't around otherwise. A bad experience would be a surprise of some kind. If you have a sprinkler you can turn on unseen, that would probably do it. I taught a cat not to jump on the counter by leaving all my forks on the counter overnight. When she jumped up, they startled her. I just had to wash my forks and my counter was cat-free from then on.

Put a box of moth balls there, scatter them about. They will not intrude. You might have to add another box when that one is gone (evaporated) but eventually they will not want to mark their territory and use your flower garden anymore. They will go elsewhere.

i have used black pepper and cinnamon mixed together to keep dogs and cats out of my flower/garden beds .

Lightly crush enough egg shells to cover the ground. Cats don’t like stepping on the sharp edges. The crushed shells are also beneficial to your plants.