Posted: 23/06/2015 at 09:06
If there's something that eats the roots of dandelions then we need to know about it ...
Just a thought - are there any keen gardeners just downwind of your lawn? Do you think that someone might just have dabbed the dandelions with some Roundup Gel while you weren't looking, in order to prevent the seeds blowing onto their lawn and causing problems?
When we moved here the lawn was in a similar state to yours, and the neighbour's lawn chap said he was very tempted to treat this lawn when he treated next door's just to prevent their problem from getting worse. He's very relieved that we now deal with our own dandelions.