What causes Phalaenopsis orchid leaves to rot and split from the middle?

The Phalaenopsis orchid is truly a dream flower for many people, not only for its flower shape that looks like dancing butterflies, but also because it comes in a wide variety of cultivars and flower colors to choose from. However, this "delicate" Phalaenopsis orchid is always prone to leaf splitting, which really leaves many flower lovers at a loss. How can this be solved in daily care? Let's take a look together below.

I believe that for anyone who grows flowers, the most feared thing is to see flowers or leaves splitting, because besides the damage to appearance, it also means the plant is not far from withering. So how should splitting be dealt with? First, you need to know that leaf growth depends more on a healthy root system. Its splitting may be caused by incomplete root development, or by insufficient humidity in the air environment, or by improper fertilization, where high-concentration fertilizer burns the leaves and causes splitting.

Among the many causes, the most common culprits are mostly drastic temperature changes and dry ambient air, which cause the leaves to lose water and split. The best way to deal with this is, first, to increase the humidity around the flowerpot, especially in the relatively dry environment of autumn, by spraying water mist on the leaves and surrounding environment to increase air humidity, while keeping the potting soil on the drier side in winter.

Second is to stabilize the indoor temperature. The optimal range is between 18°C and 30°C. If the temperature cannot be maintained within this range, it will affect the normal development of its leaves and root system. If the temperature exceeds 30°C, the plant may enter a dormant state and stop growing. It is recommended to consider buying a shade umbrella or moving it to a shady spot at noon. In winter, it can be moved to a warm indoor area.

Next are the key points for fertilizing Phalaenopsis orchids. During the peak growth season of Phalaenopsis orchids (in spring and summer), some fertilizer should be applied to ensure stem and leaf development. However, note that when using fertilizer, the concentration must be well controlled, otherwise it is easy to cause an imbalance in soil pH, resulting in excess nutrients that cannot be absorbed. Therefore, it is recommended that beginner flower lovers choose slow-release organic fertilizer, as this can continuously release nutrients while reducing the risk of overfertilization.

Finally, pay attention to ventilation. When choosing a placement environment, you can use your hand to feel whether there is a breeze passing by, or observe the surrounding air. Choosing a suitable location helps maintain air circulation, reduce the occurrence of pests and diseases, and reduce the risk of leaf splitting.