Q.How to get rid of tree starts in lawn
How to get rid of hundreds of tree starts in my lawn? I have 2 Bradford pear trees that yield hundreds of seed starts throughout my lawn. How do I get rid of them besides trying to find and pull each one? Same question for my backyard neighbor’s Rose of Sharon hedgerow lining that yard.
Unfortunately there is little that can be done.
It's best to pull the seedlings when they are still small.
You can girdle a tree, or even remove the tree.
If the Rose Of Sharon plant is sending up shoots from the roots, you can trim them at the soil surface.
https://www.gardeningknowhow.com/ornamental/trees/tgen/weed-trees.htm