There is no definite time. Water again after you have seen it clearly. As long as the surface of the soil is very dry, use a toothpick to insert it into the soil. If the soil inside is also very dry, you can water it. But watering will change with the seasons and places:
In summer, the temperature is high, the sun is strong, and the water evaporates quickly. Increase the frequency of watering properly. Water as long as it is dry, at least twice a day. In addition, to ensure the air humidity around the plant, spray water around. As long as the day does not water, it is easy to dry.
When the temperature is lower than 5 ℃ in winter, the growth of Chlorophytum will be stopped basically, so do not water it as much as possible, especially when it is several degrees below zero. Even if the soil surface is very dry, water it carefully. Of course, it's best to put it in the balcony for maintenance in winter.
The indoor ventilation is relatively weak, the sunshine is not enough, and the water evaporation is less, so the basin soil is always damp. At this time, water less, do not water if you see the tide. Water properly according to the air permeability of basin soil.
It's needless to say that we all know that the outdoor water evaporates greatly, and the water poured will be dried soon, so we need to supplement the water in time.