can’t get grass to grow where pine tree stood
20 yrs ago we removed a pine tree, one of 3. Since then we can't get grass to grow in that area. I have tried all types of grass, even the stuff that is suppose to grow on concrete. We have applied lime, new top soil, etc. but nothing works. What can I do?
First thing to think about is why the grass isn't growing in this spot. Since you have limed and applied new soil, and 20 years have passed, I think the acidifying effect of the pine tree has dissipated. Of course, you can always have a soil test done to determine the ph. You can have this done through the Extension Service; this link will help you locate one: https://www.gardeningknowhow.com/extension-search/
The main reasons grass doesn't grow in any given spot is that the spot is too shady, or too wet, has too much traffic, or something has been applied to the soil to inhibit growth. Since the pine tree grew there, I'm speculating that the spot is not too wet, so is it too shady? Have you tried grass adapted to relative shade? Or other ground cover options? This article discusses more on that: https://www.gardeningknowhow.com/lawn-care/lgen/growing-grass-shade.htm
Then, was anything applied to the area to kill the tree, perhaps, or the tree trunk? If so, you might not be able to grow anything there, and perhaps a mulched area with attractive flowing shape is an option. https://www.gardeningknowhow.com/garden-how-to/info/whats-the-best-mulch-for-my-garden.htm