re; weed swamping my garden
 

The picture shows ground elder.
If still available use glyphosate base "Tumbleweed gel" which comes in a
small pot with brush in lid, just paint it on and be patient.
Using this method it is possible to treat only the weed with no risk of
spray-over.
regards.
Also very effective against bindweed ( convulvulus) and nettles, brambles
etc.
Cineman