Susan Hayek asked: Does anyone in the UK grow Dahlia imperialis (Tree Dahlia) outside? Yes they do, and it becomes a magnificent foliage plant, but never reaches flowering before the frosts arrive. Frustrating for those who object to missing the undersized flowers. It is usually lifted and stored for the winter, but would probably survive as tubers in the ground in warm gardens. John Grimshaw Dr John M. Grimshaw Garden Manager, Colesbourne Gardens Sycamore Cottage Colesbourne Nr Cheltenham Gloucestershire GL53 9NP Website: http://www.colesbournegardens.org.uk/