What to Do When Potted Dendrobium Orchid Leaves Turn Yellow? Cause Analysis and Solutions

  Dendrobium orchids have extremely high medicinal value, which goes without saying, and since rare things are precious, many people rack their brains over how to grow and care for this rare plant well, especially when grown in pots. Many gardening friends always run into one problem or another while growing potted dendrobium orchids, such as the phenomenon of dendrobium leaves turning yellow.

  Yellowing leaves on potted dendrobium orchids is very common, so what should you do when this happens? First we still need to find the cause of the yellowing leaves, then treat the root cause, and then carry out appropriate care and management, so that the potted dendrobium can be grown well.

  From the growth habits of dendrobium orchids we can see that they like a moist and semi-shaded growing environment, so we need to create a cool and humid growing environment for them. If the environment is unsuitable, growth problems may arise.

  1. Unsuitable environment

  A moist soil environment is more conducive to the respiration of dendrobium roots, and semi-shaded weather conditions are more conducive to their growth. Conversely, if the growing environment of a potted dendrobium is hot and dry, or even has overly intense light, this can easily cause the leaves to turn yellow. So a good growing environment is the prerequisite for the normal growth of potted dendrobium orchids, and therefore we should provide as good a growing environment as possible for them.

  2. Excessive drought or waterlogging

  Although dendrobium orchids like a moist environment, this does not mean they need to be watered too much; if water accumulates in the pot for a long time, it will cause the dendrobium roots to rot. Since the plant's roots already have problems, yellowing of the leaves is unavoidable. In fact, once leaf yellowing occurs, there is no need to panic; if the plant's stems and rhizomes have not yet died or rotted, controlling watering may allow it to recover. On the contrary, if the pot remains short of water for a long time, yellow leaves will also appear, and water should be replenished in time.

  3. Temperatures too high

  Since dendrobium orchids like a warm, humid, semi-shaded environment, if the temperature is high and direct sunlight is too strong, this is not conducive to the respiration of the dendrobium roots and will inevitably cause the leaves to turn yellow. Especially in the high temperatures of summer, dendrobium orchids generally stop growing, so in addition to avoiding strong direct light and excessively high temperatures, you should also create good ventilation conditions for the plant; this not only avoids or reduces yellowing leaves but also avoids or reduces the dropping of flowers and buds.

  4. Potting soil problems

  The roots of dendrobium orchids are mostly aerial roots, so they are quite sensitive to potting soil. If the soil medium is unsuitable, or if too much fertilizer is applied to the soil, it will cause problems with the roots and in severe cases may even kill the plant. So we must be careful when mixing the soil; it is recommended to use a mix of fully fermented and thoroughly decomposed bark, wood shavings, moss and other media, and to avoid using media that contain pathogens, so as not to affect the normal growth of the plant. At the same time, we can also give the plant an appropriate amount of phosphorus and calcium to promote the sprouting and growth of roots, making the plant grow more robust.

  Of course, besides the main causes above, the plant may also show yellowing between the veins of old leaves, which is mainly due to a lack of magnesium in the potting soil; if the new leaves and young leaves turn yellow, it is mainly due to a lack of zinc. As for exactly which deficiency is causing the yellowing leaves, everyone needs to explore and sum up more in practice.