In article , "OhioGuy"
wrote:

much, but they don't die either. Because of the minimal growth, you might
want to plant twice as much to compensate.

Curious - I wonder if I could set up some sort of "wall 'o water" style
thing to really get them to live through a lot of the winter?

Look at various cold frame designs. Here is just one. The window well
covers looked interesting.

http://www.gardengatemagazine.com/main/pdf/coldfram.pdf

Bill

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Garden in shade zone 5 S Jersey USA