I decided to go with the sticks method. In the part of my garden I didn't
want my cat to go I have stuck kebab sticks at six inch intervals and about
6 inches above ground. This is day two and things are looking good. My
little two inch high wallflower plants have not been touched. I have
fingers crossed and the cat has her legs crossed!
Thanks to all for your ideas

auntie_biotic
http://www.tbandu.co.uk