How do I keep a neighborhood cat out of my wildflower garden?

The neighborhood cat loves my front yard wildflower garden. He sprays it and uses it as a litter box. What is a pet friendly way to keep him out?

How do I keep a neighborhood cat out of my wildflower garden?
Mothballs! They hate the smell and

will walk away.
Reply:go to the pet store and ask for cat repellants. Or get the neighbors to control their cat.
Reply:vigilance. pet friendly way would be to get a dog.
Reply:Sprinkle crushed red pepper through out your garden. You know the kind of red pepper that is on the table with the parmesan cheese at pizza places? That should do it.
Reply:water gun, air soft gun, paintball gun, BB gun, .22, .38, .45, .44 mag, ok how about a dog?
Reply:Orange peels. I tie a few to my christmas every year it works!
Reply:try pepper it worked for me
Reply:don't grow any catnip. :)