When new sod is laid, one of the most important things that is needed is proper watering. Watering of the sod should be done a couple times per day the first week. Many people have questions regarding watering their sod, but one of the most common is if it is ok to water sod ad night? The answer to that question is a solid NO!!!. When you have new sod or a lawn you should never water it at night. The reason for this is that watering at night will more than likely lead to disease. Water that is left to sit overnight on sod can potentially lead to fungus problems. For fungus to develop there needs to be water on the grass leaf which will allow it to move upwards and enter the leaf. When sod is watered at night, the grass leaves will not be allowed to dry until in the morning. During this time the fungus will thrive. It is also much cooler at night and this is another perfect condition for fungus to grow.
Generally most diseases are related to moisture and heat. That is why certain times of the year are perfect for disease to thrive. Humid months make it haven for fungus. Moisture is also another thing that fungus loves. The longer the moisture stays on the sod, the greater the chance of disease. It is for that reason that sod should not be watered at night, as it will keep the moisture till the morning.