Was wondering if you guys could give me some ideas here. I removed an entire bed of pachysandra, mostly by hand. I am going to put mulch overtop instead. I know that there are still some roots leftover from my weeding. Do you recommend just using roundup over whats left and then mulch, or putting a weed liner over top. I just dont want this stuff to come back through the mulch and its not easy to remove every root.