The best time to water plants is in the morning or evening, rather than in the middle of the day. There are two reasons for this.
First, it is usually warmer in the middle of the day, leading to more evaporation. Watering in the cool morning or evening means that more of the water will stay on the soil, rather than moving into the air.
Second, as mentioned in the previous post, plants don’t like their leaves to be wet. In the morning and evening, plants are often wet anyway because of dew. Watering around noon leaves the plants soggy for more of the day, increasing the risk of disease.
One way to water on a schedule is to use a sprinkler system on a timer. The next post will cover a downside of that approach.