That kind of watering practice leads to a very shallow root system with
no real drought resistance.
It would be better to have it lay down an inch of water in the morning
so and it can dry off of the foliage whenever you see the soil is dry.
Wet foliage overnight is a bad practice.
Maybe 2" this time around it's been dry here.
Increasing the organic material in your soil and adding a mulch wll
also help preserve soil moisture.