Blue Moon Climbing Rose

This is my Blue Moon Climbing Rose I have growing on the south facing wall of my backyard. Though a prolific flowering rose I have hardly many roses each year all thanks to the possums who come along the fence in the night and eat all the flower buds before they get to bloom.

I have struggled for years to overcome this possum problem; I've tried all kinds of remedies I could find on the web but they all have limited success. From deterrents to electronic devices I've tried them all. Still I found the Poss Off deterrent by Beat-A-Bug to be most effective. I have to keep at it everyday though and a bottle of Poss Off is very expensive.