God there's so much to choose from. Im going for a centre plant of lime green zinnia surrounded by red geraniums. I will also have my traditional deep blue petunias (sweetly scented) and orange marigolds. I've got a few Cineraria silver dust to dot amongst that lot and im also growing callabrichoa 'lemon slice' in my wall tubs.

Got a few large plants such as Ricinus communis and musa basjoo which will be underplanted with night scented stock

Love growing stuff in tubs.

Whether they're in sun or shade makes a difference to your choices too.

Bit of both I think Bamboo, like the sound of the marigolds with the deep blue petunias.
Do you grow the calibrichoa from seed, just googled some images and they look good too, are they easy to grow?