Creeping Charlie, Plantain, Dandelion, Crabgrass Patch
by Scherrie
(Illinois)
Doug says - first of all Roundup isn't going to help anything if you've already pulled out the weeds. It works by killing weeds not by sterilizing soils.
Second - you can put down a physical barrier, whether it is weed fabric, newspaper or cardboard to prevent the weeds and weed seeds from coming up again.
Plant and then cover the area with your barrier and then mulch over top of the barrier to stop 95% of all weeds. You'll still have to pull some but the majority will be controlled.
You'll not "kill" weed seeds by covering them but you will stop them from germinating and growing (or most of them anyway)
As long as you understand that you wont' be able to cultivate or plant other things without puncturing your barrier you're fine. Shrubs do very well in this kind of setting and as long as you're not trying to grow bulbs or other plants under them, you'll be fine.
Removing soil only takes away your weeds and replaces them with weeds from other fields. Sum zero gain here. :-)
Hope this helps