DIRT PATH TRICK 

 
 

 

You can use the dirt path to place trees over flowers etc, simply buy a dirt path and place it on the farm you wish to use, (example wanting to place trees over flowers on the same farm. Hide all items except for the trees, reload your farm and move the dirt path to a different place on the farm, plant your trees) Follow the steps below. easy peasy.
 
Hide everything on the farm you wish to use. reload that farm.
Purchase a dirt path from the store and place it on your farm. 
move it to a new place on the farm.
plow your first patch
move the dirt path to a different spot on your farm
continue to plow the rest of the farm