They are taking over!!!
Can I Transplant Grape Hyacinths Now?
Certified GKH Gardening Expert
While typically this is done in fall, you can also transplant grape hyacinth in spring but try to wait until they have bloomed and then transplant, lifting as much of the dirt around them as possible without leaving any holes in the lawn/garden (during fall, you need only lift the bulbs). Prepare the new location before lifting the bulbs and water wellafter moving.