New No dig flower bed
Ellen Porter Posts: 9
Hello, I recently tried to widen my flower bed without digging be placing thick cardboard over the lawn edge and covering with compost. I have kept this moist. How long will it take to kill the grass underneath and be suitable for planting into? Thanks.
By autumn the grass will be fully dead and you can then add container-grown stock for a more permanent planting scheme.
Have you looked at Charles Dowding's website for more info?
"recently" is vague. When exactly did you start your lasagna experiment?
I did this twice to widen my borders. Set up the lasagna in Autumn, ready to dig up and plant in the following Spring. See https://www.rezeau.org/wp-garden/en/september-small-jobs/
This technique might help, of course. But I have not found it necessary. I think patience is the key. You really have to wait at least 4 or 5 months (in my experience).