Wait for the cutting to grow roots into the soil in the original pot. This will take four to eight weeks. You may want to wait an extra week or two beyond this to give the roots more time to firm up.
Water your azalea cutting thoroughly the day before repotting. This will make it easier to dig up and move the cutting and its roots to the new pot.
Place 4 to 5 inches of potting soil in the bottom of the empty 1-gallon pot, then add a cup or so of water to the dirt and mix it around with your trowel.
Dig out and lift the azalea cutting from the first pot and gently place it in the center of the 1-gallon pot.
Add potting soil all around the cutting and its roots until the roots are completely covered and the dirt comes up to the base of the cutting stalk.
Water the cutting until the potting soil is moist, then place the azalea in an area where it can enjoy direct sunlight.