Jim, Curious to know what Arum you house in a cold frame vs. planting them outside. I know the topic of Arum hardiness has been discussed several times, but I find very few of the species on the tender side (those that died may not have been due to tenderness). I grow the following outside for more than two winters with lows to 7F and nearly a week, last year, of high daytime temperatures below freezing. This winter has not been a challenge for anything. None of these get special treatment; no amended soil, extra mulch, near the house, etc. Surprisingly A. pictum looks better outside than concinnatum, hygrophilum, and one clone of italicum from southern Italy. Arum idaeum and A. apulum died the first winter here, but was not likely cold that did it. Arum albispathum Arum alpinum 2-4 clones Arum aff. byzantinum Arum concinnatum 4 clones Arum creticum ex Pilous Arum dioscoridis Arum hygrophilum Arum italicum numerous clones Arum maculatum Arum nigrum 2 clones Arum orientale Arum pictum ex Ceni Arum rupicola 2 clones Arum sintensii Aaron Knoxville, TN zone 6-7 --- On Fri, 2/17/12, Jim McKenney <jamesamckenney@verizon.net> wrote: From: Jim McKenney <jamesamckenney@verizon.net> Subject: [pbs] Major excitement in the cold frame To: "Pacific Bulb Society" <pbs@lists.ibiblio.org> Date: Friday, February 17, 2012, 12:32 AM the cold frame is seriously overcrowded (the Arums have to go),