I keep Arums in pots to contain them. I lost creticum last winter (-18c) and a couple of others, but I admit the creticum was not properly plunged. Peter (UK) On Thu, Feb 16, 2012 at 9:57 PM, aaron floden <aaron_floden@yahoo.com>wrote: > 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), > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/ >