Spring floral plants should be full of vitality and life, but some potted flowers and tree stumps begin to wither and even die after putting out a few tender leaves. The main reasons are as follows:
Overwatering: Excessive watering will keep the soil moisture in a saturated state for a long time, causing the plant's roots to rot or mold due to lack of oxygen supply, which may even lead to death.
Overfertilization: Over-fertilization or too high fertilizer concentration can easily cause root burn, leading to plant wilting and death. Especially for newly repotted plants, their root system has weak absorption ability and mainly consumes its own internal nutrients and water. Fertilizing at this time is most likely to damage the tender roots.
Premature removal from greenhouse: In spring, the temperature fluctuates greatly. Removing the plants from the greenhouse too early can cause them to fail to adapt to the rapidly changing external weather conditions, leading to death. Additionally, potted plants that have just grown new leaves and are placed under direct sunlight will accelerate leaf water evaporation, causing plant dehydration and death.
Insufficient water supply: If the pot soil remains dry for a long time, the plants cannot receive sufficient water. With the rapid rise in spring temperatures, strong winds, and fast water evaporation, it is easy to create an imbalance in the water supply and demand of the plants, eventually leading to their death.
Improper acidity and alkalinity: Different plants have different biological characteristics; some prefer acidic soil while others prefer alkaline soil. If acid-loving plants (such as camellias and azaleas) are planted in alkaline soil, they will naturally die, and vice versa.
Pests and diseases: Major pests that cause the branches and leaves of plants to wither and even kill the plants include scale insects, aphids, Japanese beetles, and longhorn beetles. Some of these pests suck the liquid from plant tissues, some harm the roots of the plants, and others bore into the woody parts of the plants. Diseases that cause plant death mainly include powdery mildew and damping-off disease.
To prevent the springtime death of plants, the following measures can be adopted:
Moderate watering: For general plants, the principle of watering is not to water until the soil is dry, and when watering, ensure it is thorough.
Reasonable fertilization: The principle of fertilizing potted plants is thin fertilizer applied frequently, meaning each fertilization amount should be small, but the frequency of fertilization should be high. To meet the nutritional needs of plants, a 0.5% urea solution or a 0.25% potassium dihydrogen phosphate solution can be used for foliar fertilization when necessary. Over-fertilization or too high fertilizer concentration will both lead to fertilizer damage.
Timely removal from greenhouse: All plants should not be removed from the greenhouse too early. They should be moved out only after the weather conditions stabilize. Especially for newly potted plants, they should not be moved out of the greenhouse too early and placed under direct sunlight, but rather kept in the greenhouse or in a cool, ventilated place for a period of time (usually after mid-April) until their growth stabilizes, then gradually move them to the sunlight.
Appropriate pot soil formulation: During the process of formulating pot soil, both fertility and pH value need to be considered to see if it meets the biological characteristics of the cultivated plants. Soil with inappropriate pH values should be promptly remade according to requirements.
Effective prevention and control of pests and diseases: Use 1000 times diluted 40% oxidized fruit or other insecticides to spray and kill scale insects and aphids; use black light to lure adult Japanese beetles, manually capture adult beetles, or use insecticides; to prevent damping-off disease, use 1000 times diluted 70% methyl thiophanate wettable powder to irrigate the roots during the early stages of the disease.
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