Almost every description of air layering I have ever read says to leave your layer for a month and come back to check on it. This often doesn’t work in Phoenix when it is hot out (April – October) because the medium dries out. The layer should be checked weekly and watered as needed to prevent it from drying out. Set a reminder in your phone or something. Don’t forget!
A day or few before removing a rooted air layer remove most of the leaves on the layered branch. When the air layer is removed it will have a very small root system compared to the number of leaves and it will not be able to stay hydrated. Removing the leaves slows the rate of moisture loss so that the roots can keep up until they develop more.[1]
It is possible to air layer several places along the same branch, but there MUST be leaves or side branches with leaves connected ABOVE each girdle. If there are two girdles in a row on the same branch and no leaves between them then roots will not grow.
Growing in Phoenix 
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