How to prevent and treat the defoliation of Poinsettia
This article brings you the related content of the woody flower Poinsettia, on how to prevent and treat the defoliation of Poinsettia. Next, the editor will introduce to netizens.
Poinsettia, also known as ivory red, is called Christmas flower because it blooms at Christmas. It is an important ornamental pot plant and cut flower material in winter and spring. Its leaves are emerald green, and its bracts are bright, ranging in color from white, light yellow, pink, to bright red, with bright red double bracts being the best, having a long blooming period. It flowers during Christmas, New Year's Day, and the Spring Festival, making it very suitable for potting and decorating living rooms, buildings, halls, and other places. It is an ideal flower that is loved by many people.
Poinsettia is native to Mexico and tropical Africa, now widely cultivated around the world. In the warm south of China, it can be planted outdoors, but in the north, it can only be potted and requires greenhouse cultivation. Poinsettia is a short-day plant that prefers warm climates, is highly photophilic, and requires well-drained, loose, and fertile soil. It is strict about water requirements; excessive soil moisture can cause root diseases and lead to defoliation, while insufficient soil moisture can result in poor plant growth and also cause defoliation. Below are some measures to prevent defoliation for reference:
(1) In summer, avoid direct sunlight, place the pot in a well-ventilated area with a distance of 50 centimeters between pots, and frequently spray water on the ground to increase air humidity, which can effectively control defoliation caused by high temperatures and dryness.
(2) Poinsettia fears both dryness and waterlogging. If it is too dry and encounters strong sunlight, the plant will be physiologically dehydrated, causing the leaves to curl and result in massive defoliation. If the potting soil is too wet, the plant will be stuffy, and photosynthesis cannot proceed well, leading to malnutrition and defoliation. Therefore, water every two days in spring; in summer, when the branches and leaves are lush and growing fast, increase the watering amount. If there is a暴雨,排水 or move the pot indoors before the rain; water around 10 am in autumn, and move the pot into the greenhouse in the late autumn. The plant grows slowly, so the frequency and amount of watering and fertilizing should also be gradually reduced; in winter, prevent frost and keep warm, water once a week on a sunny afternoon, preferably with water temperature close to soil temperature.
(3) Poinsettia likes fertilizer, especially nitrogen during the growing period. Insufficient nitrogen can cause the lower leaves to fall off. In addition to applying slow-release base fertilizer when potting, apply fermented thin cake fertilizer water once every 7 days within a month after pinching. Too much fertilizer can cause root rot. During flowering, do not apply too much fertilizer, otherwise, the bracts may scorch. Before moving into the room in winter, apply 40% fermented human urine.
(4) Poinsettia prefers a warm, humid, and cool climate and is not cold-resistant. The optimal growth temperature is 15-20°C. Keep the temperature above 15°C at night in winter and not below 5°C, otherwise, the leaves will easily fall off. If a cold wind blows through the window in winter, it can also cause massive defoliation. Therefore, low temperature is the main cause of defoliation. For this reason, it is best to keep Poinsettia in a higher and more stable temperature environment in winter.
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