Three collections of Scilla lingulata and some Tecophilea died at at around 0 F, (minus 18 C) in pots here. Certainly both can take freezing conditions to around minus 8 C in pots. Possiably other climates might make them take lower temperatures. Planting them in the ground would. Peter (UK) On Tue, Feb 26, 2013 at 8:45 PM, Rimmer de Vries <oldtulips@gmail.com>wrote: > James > Tecophilea grow in my cold frame right next to the Scilla lingulata > Soil in frame freezes in winter > But protected a bit by 4mil poly later so soil warms on sunny days > > I just never thought Tecophilea might survive this far north. Just > how hardy are they? How cold have they survived outdoors for any members? > >