This website can be very useful for people researching their family history. We have been contacted by two whose forebears were nurserymen. One was William Butler of Liverpool. Recently we have heard from a descendant of the Cormack family whose nurseries were in New Cross, Kent, now part of south London. The Cormack's had their town outlet at the Bedford Conservatory in Covent Garden and a beautiful print (from 1831) can still be bought.
Caldwell's sold a pea known as "Cormack's Early May" and it is likely that this came from the New Cross business.