2. Crab orchid is a short sunlight flowers, afraid of strong light exposure, like slightly acidic soil, high temperature, direct light, dry air, poor ventilation and potting soil alkaline, etc., will cause the crab orchid stem nodes shriveled yellow, and easy to fall off from the base.
3. Crab claw orchids such as red spider infestation, will also be yellow, off the stem. Therefore, in summer, we should pay attention to the shade, often spray water to the plant, and pay attention to put in the ventilation place maintenance, found red spider damage, immediately spray 1000 - 1500 times the oxidized lecithin solution.
4. Watering must be moderate, can not water too often, to the surface of the potting soil is not dry not water, watering is watered through the principle. Especially in winter, must be to the surface of the potting soil dry situation, it should be noted that the crab claw orchid is drought-resistant rather than drought-loving plants, so the potting soil can not be too dry, otherwise the same will appear crab claw orchid leaves turn yellow phenomenon.
5.crabapple orchid in the growth period of fertilizer demand is not big, but if into the bud after fertilizer must give enough, in order to make the plant grow vigorously, flower buds well differentiated, bud development normal full. If the supply of fertilizer is insufficient, it is easy to appear such a situation.
6. In addition, humidity is also one of the causes of leaf yellowing, remember not to put the crabapple orchid on the heater or air conditioning wind, otherwise it will lead to accelerated dehydration of the leaves, which will also cause the crabapple orchid leaf yellowing.