The beginning flower growers often do not understand why at their orchids leaves begin to turn yellow. There is a lot of reasons at this phenomenon – however, as well as solutions of this problem.
The reason of yellowing of leaves and what with it can be made
If leaves of orchid have suddenly turned pale, but at the same time remained dense and not dehydrated, and roots of flower are in good condition, then perhaps takes place to be lack of power supply. Also tells delay of growth of plant about it. To solve this problem, it is necessary to feed up orchid the fertilizers which are specially intended for this purpose, alternating extra root and root fertilizing.
Remember that the yellowness of leaves of plant is connected directly with condition of its roots and also with overwetting or overdrying of substrate.
If the orchid is struck with fungal infection, its roots begin to decay, and disputes of fungus cork the carrying-out vessels of flower and quickly extend on it. To keep plant, it is necessary to remove urgently struck roots and leaves, having prepared orchid for replacing in pure substrate. After change the flower needs to be processed such fungicide medicines as "Vitaros", Fitolavin or Fundazol. Orchid with soft leaves on which damp spots have appeared it is also necessary to replace and treat it roots.
Care for substrate
During the yellowing and dehydration of the lower leaves of orchid which roots remain healthy the reason is in substrate overdrying. Some owners regularly water and spray plant, however water flows on pallet, and bark at the same time remains dry. The plant begins to take away water from old leaves which, in turn, turn yellow. It is possible to normalize watering of orchid, watering it with immersion method.
The orchid cannot be watered with hard water as it zasolyat substrate and provokes development of the chloroz which is expressed in flavovirent coloring.
When blossoming orchid with the turned yellow leaves, its bark can be saved from surplus of salts by means of the distilled water. It is necessary to replace plant in fresh substrate and to begin to feed up leaves extra root fertilizers. Such liquid chelate fertilizers as "Bona Forte" or Pokon will become the excellent decision at the same time. Also the surplus of sunlight which harmful affects its photosynthesis can affect yellowness of leaves of orchid. In that case, the plant needs to be removed from window or to hide in small shadow. One more reason of yellowing – age of flower. Over time the oldest lower leaves of orchid begin to turn yellow, but this process, unfortunately, is inevitable. The obsolete leaves need to be deleted accurately.