Sanwei Kwai is also called Yellow Coconut and Zi Kui. Clustered evergreen shrubs or small trees of Palmae and Solanum. The stems are smooth, yellow-green, and have no burrs. When tender, it is covered with wax powder, with obvious leaf marks and annual rings. The leaf surface is smooth and slender, pinnately divided, 40 ~ 150 cm long, with slightly curved petiole and soft apex.
Sunflower is a tropical plant, which likes warm, humid and semi-shaded environment. The cold tolerance is not strong, the leaves turn yellow below 20℃, and the lowest winter temperature should be above 10℃, and it will freeze to death at about 5℃. Therefore, southern China can still be cultivated in the open field, and the Yangtze River basin and its northern area should be preserved in greenhouses. Growth is slow in seedling stage and rapid in later stage. Suitable for loose, well-drained and fertile soil. Dense foliage, evergreen seasons, strong shade tolerance.
Sexual preference is warm, humid, semi-cloudy and well ventilated environment, and the lowest temperature in winter should be above 10℃. During the growing season, the humidity of the soil in the pot and the air around the plants must be kept moist; Sunflowers are afraid of cold and have weak cold tolerance. Generally, it is cultivated outdoors in northern China from late September to early October of 10, so it must be placed in a sunny place, with the room temperature of 23-25℃ during the wintering period and at least above 8℃ at night 15℃, otherwise it will freeze to death in winter and spring. During the wintering period, we should also pay attention to scrubbing the leaves frequently or spraying a small amount of water on them to keep them clean.
Acid soil should be selected for indoor potted Solanum lyratum Thunb, and sandy loam with high humus content should be paid attention to in the north. The culture soil can be made of humus soil, peat soil, 1/3 river sand and part of base fertilizer. Its tiller bud growth depends on the rhizome, which is slightly deeper than the original root when potted to prevent the new bud from taking root better. May -65438+ 10 is its vigorous growth period, and sufficient water and fertilizer conditions must be provided.
Watering should follow the principle of alternating dry and wet according to the season. Water more in dry and hot season, and control water in cold and rainy days. In the north of China, especially in places with high salt and alkali content in water, attention should be paid to regularly adjusting soil acidity with black alum. Keep the basin soil moist at ordinary times. During the high temperature period in summer and autumn, we should always keep the air humidity around the plants high, but we should avoid water accumulation in the basin soil to avoid root rot.