1, low temperature frostbite: may be the cause of low temperature, long-term growth at low temperature, will lead to frostbite, causing leaves yellowing, blackening, falling. 2, insufficient light: may also be the cause of insufficient light, long-term darkness does not see light, poor growth. 3, too much watering: it may also be the cause of too much watering, stagnant water roots, resulting in black leaves. 4, fertilizer damage effects: or may be the cause of fertilizer damage, resulting in burning roots.
1. Low temperature frostbite
Yellow horn orchid likes to be warm, can not withstand low temperature, if the surrounding growth environment temperature is low, may lead to yellow horn orchid frostbite, causing the leaves to yellow, blackened, fall. During the growth period of the yellow horn orchid, it is necessary to maintain a suitable temperature, increase the temperature to more than 10 ° C in winter, and do the corresponding warm measures, which can promote the safe and smooth wintering of the yellow horn orchid.
Second, insufficient light
Yellow horn orchid is very light-loving, suitable for growing in a well-lit environment, maintaining sufficient sunlight exposure, can promote vigorous growth, leafy, green leaves are beautiful. If you grow in a long-term environment with insufficient light and do not receive enough sunlight, in the long run, the growth is naturally limited, causing the leaves to turn yellow and black. You should choose a suitable placement location, keep it in a bright place, and receive light fully and evenly.
Third, water too much
Yellow horn orchids need the right amount of water during growth, if too much watering for a long time, it will lead to soil water, causing stuffy roots, which in turn leads to black leaves and limited growth. Usually when watering the yellow horn orchid, first observe the soil condition, wet conditions should not be watered, once watered too much, you need to promote drainage, strengthen ventilation.
Fourth, the impact of fertilizer damage
Yellow horn orchid should be reasonably fertilized during the growth period, if too much fertilizer is applied, or raw fertilizer is applied, thick fertilizer is applied, it will cause burning roots, resulting in black leaves. Thin fertilizer should be applied to the yellow horn orchid, and once the fertilizer is too heavy, it is necessary to water a lot to dilute the fertilizer.