Azaleas are ericaceous plants and so they should have acid soil that is well prepared and free draining. (Check to see if they are growing in nearby gardens if you aren’t sure about your soil). If your soil is alkaline, they can still be enjoyed in your garden if grown in large containers or raised beds filled with Ericaceous compost.
Evergreen Azaleas dislike cultivation immediately around them (their roots are very close to the surface) but they do benefit from a light mulch each Spring to conserve moisture. This will also discourage weeds making these plant both beautiful, and very low maintenance.