Automatic Sprinkler
For convenience, an automatic sprinkler is the best upgrade. They include a timer and automatic valve that turns the sprinklers on at set times. When combined with a rain sensor they even turn off automatically when it rains prevent wasted water. Since there is no hose to turn off manually there is no water wasted to forgetfulness.
An automatic sprinkler keeps plants for getting under watered as well. There are no schedules to forget, they are all programmed into the sprinklers computer. It saves time as well, there is nothing that has to be done once the system is programmed. Checking it every month is recommended as rain and other moisture levels change with the seasons.
An automatic sprinkler waters the plants for an equal amount of time each time which is important for growing healthy strong plants. Even if the rain is consistent during one season a few days without water can kill even the hardiest plants. Consistent watering is the key to lawn and garden health, too little and the plants wither and die, too much and molds and fungus begin to take over and kill them.