Have a go at planting begonias there. These are the small variety that you buy at Bunnings in punnets.
They are pretty hardy just keep an eye on them as they get started. They are green all year round and mine flower most of the year and I do nothing to them.

Bulbs are good also so go to the garden shop and find out which ones are good for planting now.

We were given a bit of Rosemary, put it in water and it took off. So that look like it will be easy to grow and you cut it back when it gets to big. You will also have a plant that smells nice and a herb close by