Posted: 30/03/2015 at 18:00
We've got a banana that is doing pretty well - we've finally (after seven years) figured out the best way to protect it without it rotting! For a couple of years it died back to nothing over winter but it still came back in the spring.
The dahlias are not strictly tropical but they do look good - especially the dark leaved ones with bright orange or red flowers.
I've done ricinus communatis from seed each year too, they are great! But not this year because we've got a dog now and I can't risk anything that poisonous round him (labrador, will eat anything).
i think this year I'm going to try some of those exotic-looking annual climbers, put up a few obelisks and see what they look like peering out among the cannas...