Brian wrote: >> Can someone advise me on growing Ferraria in the UK? Brian, I want to underline what Alberto said -- Ferraria when they're happy are thick-stalked plants that don't flop over. I grow them in California, in 8-inch (20 cm) pots, in an area where the temperature in winter ranges from the 50s-60s during the day (around 15C) down to about 20F at night (about -7C). They don't show any frost damage at that temperature, although they do get leaf burn if the temp drops much below that. So you definitely do not need to keep them warmer than they already are in your frost-free greenhouse. They might even be a bit happier growing in colder conditions. I'm also a little surprised that you have some of them over a foot high already. Mine are just getting started at this time of year (my earliest one, Ferraria densepunctulata, is a few inches tall right now). Of course, the pots are bone dry from May until late October, so there's nothing to trigger growth during the summer. If I had to guess, I'd suggest more light, lower temperatures in the growing season with day-night variation, and keep them as dry as you can in summer. Hope that helps. Mike San Jose CA (zone 9, min temp 20F / -7C)