I have had this plant outside in a large pot against a south facing wall, and now heavily screened behind culinary bay and sage bushes etc. It grows up most years to a height of 8 feet into a clematis armandii before getting frosted sometime in the winter; and usually before flowering. I guess I may have had serious flowering for around 3 years out of the last 15 or more. This is in a garden where I have had pots of Tropaeolum tricolor flowering in unheated glass and plastic greenhouses. They look a bit sad when frosted but recover as the temp. rises, and when I tire of them in mid April take late spring frosts in full flower in the open, before going dormant. Brian Whyer, Buckinghamshire, England --- On Mon, 20/10/08, John Grimshaw <j.grimshaw@virgin.net> wrote: Uli Urban wrote about Tropaeolum pentaphyllum: >I have never tested with my plants but I > think it is not very hardy and is not suitable for outdoor cultivation > in winter cold climates below freezing. This has always been my view as well, but earlier in the summer I was visiting a garden in the Cotswolds and saw the familiar flowers of T. pentahyllum twining round something else. I expressed my surprise and was told it was hardy there! The garden in question is even higher than we are here, so I shall put my plant out for 'hardiness testing' next spring. It certainly doesn't deserve precious greenhouse space... John Grimshaw Dr. John M. Grimshaw