Amazingly, the feijoa
is even hardy enough to survive here outside in sheltered mild spots. It's an evergreen shrub with grey-green velvety leaves, white underneath, and incredible fuchsia like flowers which if you can bring yourself to, are edible in themselves.
Don't be tempted to eat too many though or you'll miss out on the sizable and intensely aromatic fruit, that can be produced in significant numbers during the autumn, and make a great addition to a fruit salad or delicious jelly.
If you can't find room for it in your conservatory then try it somewhere warm and sunny in the garden.