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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comI’m new to this, don’t want to kill them by covering, but don’t want them to perish in the cold winter up here…I have bushel baskets, and have read to lay a good cover of mulch at base..but should they be covered, or will that kill them..? thanks.!
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1 Comment To "i have a zinfin doll hydrangea, and a buddelia, zone 5 (nh) do i need to COVER them for the winter? or is mulch at base enough..?"
#1 Comment By MichiganDot On 10/15/2019 @ 2:39 pm
Your hydrangea and butterfly bush are hardy. However, butterfly bush dies back so part of winter prep is to cut all stems down to 9-12 inches. Don’t cut back the hydrangea; in spring you can cut it back by 1/3 if you like. Put 2-3 inches of loose mulch, wood chips, chopped leaves or straw, over the roots. No other winter prep is required except watering the plants if autumn is dry.