Q.Will Adding 8 To 10 Inches Of Topsoil Over Boston Ivy Plants Harm Them?
I need to enclose the area where my Boston ivy plants are in a planter. They have been in the ground for 3 years now and really grow well. I need to raise the topsoil by about 10 inches to accommodate the block planter border that they will be in. Will the 10 inches kill the plants?

Certified GKH Gardening Expert
Yes, covering them could very well smother them. You need to dig them up and replant after the 10 inches of soil is added.
https://www.gardeningknowhow.com/ornamental/vines/boston-ivy/growing-boston-ivy.htm