David wrote: "Haven't had to chance to look in detail at the new pages yet, but this Royal Horticultural Society paper might be useful:-" , but had a typo in the url. The corrected url is http://rhs.org.uk/RHSWebsite/files/… and a very interesting list. Best Jim W. -- Dr. James W. Waddick 8871 NW Brostrom Rd. Kansas City Missouri 64152-2711 USA Ph. 816-746-1949 Zone 5 Record low -23F Summer 100F +