Winter Preparation for Coreopsis - Knowledgebase Question

Council Bluffs, IA
Question by rbinns
August 19, 1999
We live in zone 4, which actually borders on zone 5; when and what do I do to prepare my Coreopsis (coreopsis verticillata 'moonbeam') for winter?

Answer from NGA
August 19, 1999


In my garden I leave the foliage on perennials until the frost kills them back. It is important to leave the foliage intact while it is still green so the root system can store up enough food energy for the long hibernation. I then cut them back to ground level. Apply a light, airy mulch such as straw or pine boughs after the ground freezes.

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