What is the best time of day to water my impatiens?
Time of Day to Water Impatiens
Certified GKH Gardening Expert
Watering in the morning is normally preferable, though they may also be watered in later afternoon, as long as they have time to dry some before nightfall. These articles should help (the one for veggies also applies to most other plants): https://www.gardeningknowhow.com/edible/vegetables/vgen/water-plants-vegetable-garden.htm