Why do flowers and plants lack water? Mainly these two reasons

We all know that during the growth of flowers and plants, water is a very important nutrient, and when keeping flowers and plants at home, people generally pay attention to watering. If flowers and plants lack water, it often causes them to wilt, and the leaf color becomes pale and yellow. So what exactly causes flowers and plants to lack water?
Camellia
First, for flowers and plants that like warm and humid environments, when summer comes, because the air is too dry and the amount of water evaporation is large, they cannot obtain the water supply they need and become dehydrated. The rescue method is to move the potted flowers to a ventilated and shady place, wait for the temperature of the potting soil to drop before watering, and then starting from the next day, water once in the morning and once in the evening. Note that the watering times in summer are: before 10 a.m. and after 5 p.m. When the weather is cooler, watering should be done around noon, and when the weather is cold, watering at 2 p.m. to 3 p.m. is better.
Second, a lack of water in the potting soil is often caused by the grower using too little water each time, only wetting the surface of the potting soil, so the water cannot penetrate deep into the bottom of the pot, and the roots below do not absorb water. Over time, the flowers and plants naturally wilt because they cannot get water. The remedy is to water the potting soil, but note that the amount of water can only be increased gradually, and it must not be suddenly watered too much. This is because when the flower and plant are wilting, the root hairs have already shrunk and lost their water-absorbing function. At the same time, wilting has already caused the cells to lose water. If water is supplied too suddenly and excessively, it will cause the cell wall and the protoplast to separate.