Chrysanthemums can withstand severe freezing temperatures, provided the plants aren’t in a flooded area or a soil with high moisture content.Mums should also be mulched to limit the heaving action of the ground to winter’s freezing and thawing. Chrysanthemum roots exposed to the winter sun and wind will dry out. Cut plants off an inch above ground after death by frost. Allow foliage to lay on top of the plants as a mulch until spring when it can be composted. Mulches limited the heaving action of the soil by winter’s freezing and thawing.
Hardy chrysanthemums should not die if no foliage removal occurs in the fall. Leaving plants may add winter interest to the landscape.
Avoiding Winter Injury
Chrysanthemums require a well drained soil to avoid winter injury. Plants surrounded by water or ice during freezing temperatures are likely to die. Avoid placing plants near downspouts.
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