Keen to grow avocado, Mango and coffee.

Kath says...
Penny, it is always better to grow plants that are well suited to your climate. The problem with growing marginal plants is that they can struggle and the dissapointment can be great. Frost is one of those things that can kill a mature tree overnight. In Kyogle we can grow mango trees well, some frost free sites are perfect. In low lying areas however an unusually cold frost last year desimated avocado, mango, lychee, longan, black sapote, star apple, santol, soncoya, sugar apple, jakfruit, custard apple, cherimoya and the list goes on, basically anything with a leaf.
There are however lots of trees that love a little chill on their buds, nashis, apples, pears, pecans, pomegrantes and kiwifruit. Blueberries, grapes and the gorgeous persimmon. I would start with these before I planted anything under the casuarinas on the riverbank. If you choose a tree that suits your climate it will thrive and you will be satisfied. If you have you mind set on coffee, try the catui in a pot and move it into a protected sopt in the winter.