
GKH_Susan
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on March 28, 2021
It's a bit early. You can start venting on nice days and check for any new growth.
When all danger of frost is passed you can uncover. Usually the last frost is in the end of April.
https://milwaukee.extension.wisc.edu/files/2010/09/PPtsRoses.pdf
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