The transpiration and also the water requirement depend strongly on the temperature conditions. At low temperatures, the plant absorbs less water and also transpires less. This must be taken into account when supplying water to plants that are cool in winter, since their water consumption is much lower than with the high temperatures in summer or in heated rooms.
In general, the water supply of our indoor plants must be based on the soil, Temperature-, light- and humidity conditions are coordinated. The amount of water required by the individual plants varies and also changes within the species with the stage of development.
As is well known, the species-specific requirements of our houseplants are based on the climatic conditions of their home areas. Sc claim e.g. growths, their natural location of the ever-moist, tropical rainforest is, in addition to consistently high temperatures ample soil- and high humidity. Through the high ground- and humidity, many species of this plant formation have only a small root capacity in relation to the leaf mass. They are often equipped with aerial roots, used for breathing, since there is a lack of oxygen in the moist soil, or the roots are as detention- and supporting organs formed, with the help of which the plants climb up trees. Exposed to little air movement in natural habitat, these tropical plants are sensitive to draughts, which causes them to release more water and, if there is a lack of water, leads to damage from the mostly large leaves drying out. Hydroculture is therefore particularly suitable for such plants. In homes with dry air and seasonal conditions, severe temperature fluctuations, these demanding plants usually do not find favorable growth conditions. As a rule, we can only offer them in closed plant windows and plant showcases.
The plants are adapted to contrasting environmental conditions, those of the tropical and subtropical dry- and steppe regions. They include many of our most trusted houseplants, whose wild species sometimes have to overcome the most extreme conditions. Just think of the cacti and other succulents, who are able, to exist with mostly very low humidity and temporary or permanent lack of water.