Our lawn is overridden with weeds (mostly dandelions and clover). Part of the problem is we have not done much to maintain it over the years and also we don't use any herbicides. I wanted to tear up the current lawn and put in new sod. The company I spoke to said they would dig out about 3 to 4 inches and put in a fertilizer (I made it clear no herbicide) and put in about 2 inches of triple mix and resod. They think this should solve the weed problem. Another landscaper I spoke to seemed to think this is a waste and they will just grow back if we don't use a herbicide first to kill them, as the roots can go deeper than the 3 to 4 inches. Can somebody please advise? (We live in Mississauga, Canada)
The second landscaper is right. If you get someone else to do the job, they will either need to kill the weeds with herbicide, or they need to dig out each weed separately, extracting all root material, and that may mean going down 8 inches or more to get out a dandelion root. If this is not done, they will regrow through the new lawn.