winter care in Pacific Northwest

[Mary Lamb]

I purchased An Encyclopedia of Shade Perennials by W. George Schmid and I've
been reading the section on Arisaema. The author, who lives in Georgia,
discusses the difficulty of raising arisaemas where the soil is cold and wet
in the winter. For many species, he recommends overwintering in barely moist
peat in a cool garage or basement.

How about this? In The Explorer's Garden, Dan Hinkley mentions growing
arisaemas in his woodland garden, and it doesn't sound as though he lifts
the plants and brings them in for the winter. It doesn't often get very cold
here, but it is usually wet during the winter. What do people do? (I thought
I would ask the Enthusiasts first, before I begin pestering those people in
whose gardens I have observed arisaemas.)

Mary Lamb
Seattle Washington