1) improper water and fertilizer. In the growth process of crab claw lotus, too much water and fertilizer lead to the growth of branches in vain, and nutrients are mostly used for the growth of vegetative organs (roots, stems and leaves), while the lack of nutrients in reproductive organs (flowers, fruits or seeds) affects the formation of flower buds, resulting in no flowers or less flowers. Even if it can bloom, it is easy to drop flowers and buds. This phenomenon often occurs in the case of too much nitrogen fertilizer and insufficient phosphorus fertilizer, which will affect the formation of flower buds. Therefore, it is necessary to pay attention to the application of flower fertilizer containing more phosphorus fertilizer or 0.2% potassium dihydrogen phosphate solution during flower bud differentiation, which is beneficial to the formation of flower buds and the pregnancy of buds. Too much fertilization and frequent watering during pregnancy in bud stage can easily lead to flowers falling and buds falling, long-term lack of fertilizer and water for peanuts, poor plant growth, emaciation and short stature, and also easily lead to few or small flowers and poor flower quality.
(2) The illumination temperature is not suitable. Because the crab claw lotus has different habitats and different ecology, some like light and some are suitable for semi-shade; Some like warmth, some like coolness, some like warmth and humidity, and some are drought-tolerant. If their living conditions are not satisfied, it is easy to cause falling flowers and falling buds.
(3) The soil salt content is high. Crab claw lotus likes slightly acidic and neutral soil, but is afraid of saline-alkali soil. Even more saline-alkali tolerant flowers, such as geranium, rose, etc., will affect their growth and flowering when the soil salt content exceeds 0. 1% and the pH value exceeds pH7.5, because the soil has the best nutrient availability and is most suitable for the growth and development of flowers under the slightly acidic strip of pH6-7. Acidic soil not only affects flowering. In severe cases, it will lead to plant death.
(4) Not pruning the branches for a long time, the branches are messy, which not only affects the appearance, but also consumes a lot of nutrients because there are many unnecessary branches, which affects the formation of flower buds, which is one of the reasons for not flowering or flowering less.
(5) The room temperature is too high in winter. In winter, most flowers are dormant or semi-dormant, and the suitable room temperature is about 5 degrees. Even if some flowers like warmth, such as Milan and glass dishes, the room temperature should generally not exceed 12℃. Pomegranate, rose, peach, potted grape and fig are suitable for low temperature (about 0℃). If the room temperature is too high, it will affect the full dormancy or premature bud emergence of flowers and trees, consume a lot of nutrients, and the second year will be weak, not flowering or thin and thin, and easy to fall.
(6) Pest invasion. In the process of growth and development, flowers are often vulnerable to pests and diseases, and their growth is damaged, which affects the accumulation of nutrients and is also a reason for falling flowers and buds.