We have an area in our garden that was once lawn and a veg plot. I bought horse manure from a local farmer and now have a garden full of nettles, docks and dandelions. We are slowly clearing the weeds but wonder about using weed killer over the rest. We intend to lay turf to make it all back to lawn, but would weed killer ‘poison’ the ground. And how long would we have to leave it before we lay turf.
Certified GKH Gardening Expert
If you follow the instructions exactly on the weed killer container it shouldn't poison the ground.The instructions should tell you too if there is a waiting period to plant. It's usually just a few days. Some people prefer not to use chemicals and in that case you can lay clear plastic over the area (weigh down with bricks) and let it "cook" for 6 to 8 weeks.
Here's an article with a bit of info about laying sod: