Tithonias. Those tall, gently swaying, orange flowers that fit so well into a late summer planting scheme, have just begun to flower in the garden. From seed sown in early April, they have gently just grown, needing only 1 potting on before I put them out, from modules to 9cm pots, more to keep the slugs away than anything else. Planted out in early June, it's only taken a month to get them into flower, and regular dead heading or picking for the house, will keep them flowering for a while.
All they need is a warm start and to be kept moist once they've germinated. Why not give them a go next year?