The rule of thumb, (or should we say green thumb. :)..) is to water your grass either Early Morning, ar later in the evening after the sun starts to set. This is because you want to avoid direct sunlight when water or fertilizing your plants and grass.
If there is any type of liquid on your plants or grass, there is a good chance it can burn in the sunlight, killing your plant’s leaves and leaving your grass dried up and brown. This is a major reason for people to have brown patches throughout their lawns.
Another important reason behind fertilizing your plants and grass when the sun is not out is to prevent evaporation. Not only does evaporation dry out and kill vegetation, but it also quickly dries up the liquid needed to help the plants grow.
When the sun is up it can dry up the fertilizer quickly, not giving it enough time to reach the roots and absorb up into the plants.
Always make sure to fertilize your garden or grass in the dusk or dawn hours of the day. If you don’t have the time, you may want to invest in a sprinkler system that you can set specific times.
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