Plants suck water from the soil. When water through the stomata in the leaves will evaporate results are different water concentrations in the cells. This ensures that water from the soil by the roots, stem and leaves from one cell to another cell is about to move, until all cells of the plant contain sufficient water again. This phenomenon is called root pressure. The environment ensures that this can happen. Light, temperature, humidity and wind stimulate the evaporation of water through the leaves. The substrate or the soil determines the amount of water available for the plant. In addition, the water requirement depends on the plant itself. The type, the size, age and general health of the plant all have influence on the water requirements of the plant. So there is not a standard answer to the question: How much water does my plant needs
1. If you want to know whether it is time to water your plants you stabbing a finger into the potting soil. The top layer will pass through the contact with the air to dry out the fastest. A few inches below the surface will be a better indication of the moisture in the soil.
2. A moisture meter shows you clearly when it is time to give your plants water. This is one device you can get for a bargain at garden centers.
3. Cavities in bottom of the pot ensure that excess water can drain away easily.
4. A layer of clay pebbles on the bottom of the pot for extra drainage protects the plant against drowning.