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Winter Protection
As this is written in early November, it's still too early to apply winter protection to newly-planted perennials, but it's not too early to plan for it, if you garden in a cold-winter area (USDA Zone 6 [-10°F] or colder).
Although you might think a winter mulch keeps plants warm, it's intended to do the opposite—to keep the ground frozen, instead of repeatedly thawing and refreezing. That freeze-thaw seesaw can heave lightly-rooted plants right out of the ground, leaving their roots vulnerable to freezing or drying out fatally. Perennials planted or transplanted in the fall are especially susceptible during their first winter.
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