My tree is losing its leaves they turn brown and fall off. What can I do to save my tree? The tree has some dead branches.
This is difficult to determine, not knowing if this is an indoor or outdoor tree, and the size of tree that you have.
This could be a number of issues, including environmental; exposure to elements such as sun and drying winds.
Changes in water; too much or too little.
Root disease or pests.
See if the trees branches have died off. Scratch the bark, if you see green it's still alive.
Here are some links with more information.