I'm not sure if this is a tree question or not, but I got such good advice the last time I asked a question here, I decided to give it a try.
I have a very large front lawn, over a quarter acre, which contains two large Norway Maples, that are actually somewhat appealing. Each about 60 feet tall. When I moved in last year, the roots at the base were all exposed, no mulch, with very sparse grass starting about 20 feet from the trunks mixed with various weeds. Over the past year I've worked to fix all that,--added mulch to about 15 feet from the trunks in all directions, then added light soil, some compost, fertilized, killed the weeds, and reseeded. I did not cover any exposed roots with soil , just mulch. Now it looks much better, but even beyond the driplines of the trees, the grass is sparse and unable to handle any stress, such as the summer heat. It's plain to see that the farther one goes away from these trees, the better the grass grows.
I know the roots of trees can extend far beyond the driplines, but does that mean the two cannot co-exist? In other words, if I work harder on enriching the soil around the trees, is it likely I can get the grass to grow properly?
Or would it be an endless/losing battle?
I had an arborist out to prune them, because of their size, and he made it plain he didn't like them as a species, and said they would never co-exist with a nice lawn.
All comments are appreciated.