How do I stop neighborhood cats from defecating and urinating in my garden?!?

Question

I am getting sick and tired of my next door neighbor's cats coming into my flower garden and using it as a toilet (it stinks horribly!). Not only that but I've watched her cats dig into my mulch and expose the roots of some of my plants (which a few have died). Talking to my neighbor does no good. She doesn't care about the situation and thinks I'm inconveniencing her for asking her to keep her cats on a leash or in the house! What gall she has!

Answer 1

Try placing mothballs around the garden. Usually the smell will detour them.

Or there are some pray products out there, like "Boundary", that usually work but once the smell is gone in a few days you need to go out a respray. Normally after doing this for several weeks the find another potty spot.

Answer 2

A motion-detecting sprinkler!

http://www.greentouchirrigation.com/scar...

Answer 3

put some thing that smell in the garden that will make the cat go back  home