I bought a Dwarf Meyer Lemon tree in October and planted it in my back yard in Bernal Heights, an area of San Francisco that has clay soil. I learned that clay soil holds water so I was very careful not to over water it. I am sad to report that over the past three weeks the tree has lost all it's leaves. It was doing really well until our rainy winter season started, but I can not control the weather or amount of rain it gets. I am at a loss as to what I should do. Is it hopeless or is there something I can do to save it? I gave it some fruit tree fertilizer back at the end of December. Could that also have caused it to get stressed?
I would pot it immediately, in attempt to resuscitate it's drowned root system, and allow the tree to recover.