Azaleas need water regularly and I notice from the pictures that there is no mulch. Try adding 3-4" of mulch so you minimize the amount of waterings that will be needed. If the soil is as alkaline as Jean suggests, you will also need to amend the soil regularly with garden sulphur or iron chelated liquid compounds. A soil test (available from your Agric Extension Service) or a soil pH kit (available on many nurseries and by mail) can tell you how alkaline your soil is.

Azaleas like to grow in acidic soil whose pH ranges from 4.5 to 6.0 but will tolerate a little more alkalinity. Growing them in raised beds may make the soil alkalinity/acidity easier to control. Growing them in pots is another alternative. If your soil is alkaline, there is also a good chance that your water IS also alkaline. Applying water from the faucet regularly may undo the effect of garden sulphur and force you to apply those amendments more frequently.

It is very easy to tell if they need water. Insert a finger to a depth of 4" to see if it feels wet, moist or dry. If it feels dry or almost dry then water. If it feels moist, do nothing. If it feels wet, determine what is causing that because azaleas do not like wet feet for long periods of time. Be careful when researching the cause of wet soil as most of the roots are in the top 4" of the soil.

Use the finger method daily for 2 weeks and make a note on a calendar every time that you have to water. After two weeks, determine how often you had to water and set your sprinkler or drip irrigation to water 1g of water on the same frequency. If the temperatures vary by 10-15 degrees plus or minus, you can check again to see if you need to tweak things. If your soil is sandy, add 1.5 g of water instead of 1g.