mulching beds with creeping ground covers
I am starting a mulching routine to revitalize some older beds that were quite neglected by the previous owner.
How to deal with creeping ground covers, such as creeping thyme -- mulch over them or around them? Is there a third option?
If I do not mulch over them, will the level of the bed gradually rise around them, leaving the patch of thyme in a "pothole?"
A small issue, indeed, but as always I appreciate any insights.