I noticed some inquires about “Walls o’ Water. These are adverised in many seed catalogs, Park and Jung included. Don’t know if the inquiry about an unheated porch was in reference to mine, but mine is galssed in and warm enough right now to put the potted peony roots, which have already sprouted in the package, out there, though it still can get down in the teens at night. Our present temps get to the 40’s during the day, and the snow is going slowly enough to drain into the ground. Spring is coming to the U.P.
When dealing with frost it is always best to be paranoid. In the spring never think it is too late for one more frost to come. And in the fall never think it too early.
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I think wallowater is the most overrated product in all of gardening. They are too expensive and just do not get plants going any faster. They might semi protect plants put in the ground too early but compost volunteers will be bigger by early June. The plants end up with the very abuse that does not add to their later vigor.