Many people are tempted to mow and water their lawns in the evening before putting the gardening tools away and getting ready to relax for the night. However, experts advise against watering in the evening. You may think the overnight saturation is good for your lawn, but it can actually be quite detrimental.
Allowing water to lie on the grass all night leads to the spread of fungus. As the fungus spreads, it will create thin, discolored (usually straw-colored) circular spots within your lawn. The fungus may not be noticeable at first, and is liable to kill your grass, especially if left untreated for too long. Many people also mistake these dry, discolored patches as a sign to water more, further exacerbating the problem.
If your lawn falls prey to fungus, it is possible to treat on your own; however this could be costly since most fungicides are sold in bulk. It might be cheaper and most cost-effective to have specialists treat the fungus to ensure it is completely eliminated from your lawn.