Good experiment. I would be interested to know the results!

Our banana trees are also getting battered by the wind at the moment and our one little bunch of bananas is still hanging on, waiting for those warmer temperatures...

I like that yours are still small when they start producing fruit. Did you buy a dwarf variety for this? Or is it just that they are only one year old?

No idea for avocados I'm afraid. Though again, I would be interested to know what you find out. We have three healthy looking avocado trees, almost as big as the children now ;) The only thing I know about them is that they require more water than other trees.