Simple rule of thumb for all lachenalias- if you can grow nerine sarniensis, you can grow all the lachenalias, neither can stand much frost (a wee bit overnight, just) but no prolonged cold at all. We give them the same regime and are successful (but then we do have a spacious Venlo type glasshouse with whistles and bells and winter heating to keep the minimum temperature to 3 degrees C. If you struggle with nerines, you'll struggle with lachs. Nikko