When it comes to growing plants, including any type of shrub, one of the most important things that these things need in order to grow is water. Water is an essential part of allowing your shrubs and plants to thrive.
Typically, you should plan on watering your shrubs and plants at least once each week. This watering needs to be thorough and soak the ground. One option is to use a sprinkler. You can adjust the timer of the sprinkler to roughly ten minutes to see if it allows enough time to soak the ground.
If the ground is still absorbing the water you will need to set the timer for a bit longer to ensure that your shrubs are getting enough water in order to grow. If you plant your shrubs during the fall months you need to water regularly until the first frost hits.