Avocados in the Las Vegas Desert?

Q. I am trying to grow an avocado tree.  I have it in a container and it's now 22 inches tall.  When is the best time to transplant and what is the best way to take care of it in our desert?

A. As you are probably aware, avocados are “iffy” in the Las Vegas climate. Probably a little worse than citrus regarding surviving winter cold. It depends on which avocado you are growing. 

            With that said, I would put the container in a protected area away from extreme cold during the coldest part of this coming winter. Around the first week of March, I would plant it in the ground. Make sure you amend the soil and do not fertilize it after August 1.

http://xtremehorticulture.blogspot.com/2014/01/solutions-for-home-avocado-production.htm
lhttp://xtremehorticulture.blogspot.com/2016/03/avocados-for-cold-desert.html