Grass killed by mattress?
I left an old mattress on the lawn. I didn't remove it for about a month, by which time the grass was brown with something resembling white shoots emerging from the ground. I'm not sure if it's dead or not.
Is there some way I can get it back to healthy green grass?
I attach a picture of whatever is growing in that patch. It's only in that patch, nowhere else on the lawn.
My knowledge of gardening is close to zero so please don't assume any knowledge on my part.
Many thanks to anybody who can help.
(Repeat thread to include