Garden Plant Pots

Preferably plants that will grow at the base of a hedge where the cats come and go to the next door property.

Some time in the night a possum visits my back garden in Sydney (so not a big garden), knocks over most of the plant pots and eats all the herbs we’ve got planted. Anything we can do to deter it?
I should add that I don’t really want to deter cats… got lots of cats in our neighbourhood and I love them visiting

I have spent quite a bit of time and money getting my garden ready for the summer, however local cats etc seem to have taken to digging up my plants.

I got a new plant called a dish garden and my cat keeps eating it. I was wondering if it will hurt him.