Also known as cathedral bells, this vigorous vine is a native of tropical America, where it grows as a woody perennial.
This variety has clear white flowers which is a change from the traditional purple. Plants take a while to flower so it is good idea to sow the seeds early. It may be grown in large pots for standing outdoors in summer, and will behave as a perennial if kept indoors in winter at about 45F. In a very mild winter plants may survive and remain virtually evergreen, but they are usually grown as annuals on a wall, fence or pergola.