The Q&A Archives: Watering At Night

Question: I live in a townhouse and my Association has been watering between the hours of 11PM and 3AM. I have noticed that the pests have increased and are out of control. The landscaping service said watering at these hours will not have an effect on the landscape.

Answer: Your Homeowners Association may be trying to conserve water by watering in the wee hours of the morning, because less will be lost to evaporation. They may also be trying to make more water available during peak hours when people are using it for other things. Watering in the early morning hours will accomplish both these goals. There is a concern that some plants may be more susceptible to disease if their leaves get wet and remain wet all night. From a healthy plant standpoint, watering is best done in the very early morning so the leaves have a chance to dry out before nightfall. Although this may not be possible in your housing complex, it is certainly a suggestion you can make. There is no evidence that watering at night will increase or decrease the number of insect pests, however, so if there's a great influx of bugs, it's probably just a coincidence.

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