I bought a willow cherry tree in April. It's about 45" tall. Today, it lost all of its leaves, dried out even though I watered it. Ends are dry. I scratched the bottom trunk, and it is brown. How do you know if it's time to say it's dead?
How Do I Know if Tree Is Dead
Certified GKH Gardening Expert
Here is an article on how to identify a dying tree that may help you:
Given that this is a new planting and you had a scratch test that was 'brown' I would approach the nursery you bought this tree from and inquire about a replacement.