I live in Nova Scotia, Canada and would like to transplant them now. Is this possible?
When Can I Transplant Lychnis Coronaria?
Certified GKH Gardening Expert
If the plants are done blooming I would trim them back prior to moving them.
You can make the move now with some extra watering and care.
Make sure you water daily for the first 2 weeks, then cut back from there. Water regularly through the fall. Mulch will help with moisture and cold protection.
Here is link to refresh you on the care requirements.