Reasons for Blackening Leaves on the Dolphin Flower and How to Care for It in Summer
The dolphin flower gets its name from its unique flower shape, which closely resembles a leaping dolphin. Its blooms are light and graceful, with fresh and elegant colors.

During care, especially in summer, a season of high temperature and high humidity, the dolphin flower sometimes develops blackened leaves, which not only affects the plant's appearance but may also signal that something is wrong with the plant's health.
So what causes the dolphin flower's leaves to blacken, and how should it be cared for correctly in summer? The dolphin flower is susceptible to infection by certain fungal diseases, such as black spot and anthracnose. These diseases cause black spots to appear on the leaves, which gradually expand and turn the leaves black. Usually, the occurrence of disease is related to environmental conditions of high temperature and high humidity with poor ventilation.
Overwatering or underwatering can both cause the dolphin flower's leaves to blacken. Too much water deprives the roots of oxygen, affecting the plant's normal respiration and water metabolism, which leads to blackened, rotting leaves. Underwatering, on the other hand, leaves the plant short of water, causing the leaves to dry out and blacken.
The dolphin flower likes a semi-shaded environment. If exposed to strong sunlight for a long time, the leaves are easily sunburned, developing black spots that gradually turn black. Conversely, if light is insufficient, the plant grows poorly, which can also cause the leaves to blacken.
Excessive fertilizing or using fertilizer at too high a concentration will burn the dolphin flower's root system, affecting nutrient absorption and causing the leaves to blacken. The dolphin flower's suitable growing temperature is between 15 - 25°C. Both high summer temperatures and low winter temperatures can harm the plant and cause the leaves to blacken.

Key points for caring for the dolphin flower in summer:Summer sunlight is strong, so avoid exposing the dolphin flower directly to the sun. It can be placed in a spot with diffused light, such as under tree shade or on the inner side of a balcony. The mild sunlight of early morning and late afternoon can be provided in moderation, which helps the plant grow and bloom.
When summer temperatures are high, be sure to cool the dolphin flower down. The temperature of the surrounding environment can be lowered by misting, ventilation and similar methods. If the temperature is too high, the plant can be moved indoors to a place with air conditioning, but avoid direct airflow from the air conditioner.
Summer temperatures are high and water evaporates quickly, so the frequency of watering needs to be increased appropriately. But be careful to avoid waterlogging, which can cause root rot. Generally, water once the soil surface is observed to be dry, and water thoroughly until water flows out from the bottom of the pot.
Good ventilation is very important for the dolphin flower's growth. In summer, open the windows frequently for ventilation to keep the air circulating, lower humidity and reduce the occurrence of disease. Summer is a period of high incidence of pests and diseases, so inspect the dolphin flower plant regularly and promptly detect and deal with pest and disease problems.

Blackened leaves on the dolphin flower may be caused by a variety of reasons, and we need to observe and analyze carefully. When caring for the dolphin flower in summer, pay special attention to the management of light, temperature, watering, fertilizing and ventilation, and create a suitable growing environment for it.