The feeding requirements of Yan Laihong are relatively high, and more attention should be paid to daily maintenance. However, many flower lovers don't know how to maintain them. The following small series will tell you about the cultivation techniques, maintenance points and feeding methods of Yan Laihong. Cultivation techniques of geese: Choosing suitable culture medium is very important for the cultivation of poinsettia, which not only affects the management of the cultivation process, but also is the most important key to the cultivation of poinsettia. No matter what kind of culture medium growers use, it should be light, porous, well ventilated and well drained. However, the PH of the culture medium should be adjusted to 6.5-6.8. During several years of cultivation, researchers used peat soil as the main culture medium, supplemented by Hainan coconut bran, Nanhai perlite, imported coconut flakes, river sand, yellow mud and lime. Among several ratios tested by researchers, 1 river sand: 2 yellow mud: 3 coconut flakes: 5 perlite: 7 coconut chaff: 15 peat soil: appropriate amount of lime is the best. Greenhouse facilities: the greenhouse facilities needed for Yanlai to produce red potted flowers are mainly used for rain protection, followed by wind, cold and sun protection. Considering the factors of economic production, the province mainly uses plastic film greenhouses to produce poinsettia potted flowers. The optimum growth temperature of poinsettia is about 18~20, which is mainly due to the adjustment of the cultivation environment by the hardware structure of the cultivation greenhouse and related facilities, which is beneficial to the production of salt-tolerant potted flowers. Irrigation system: the potted flowers of Yanlaihong grow fast, need more water, and the branches are brittle, which is easy to damage the buds in the later stage. Traditional manual watering methods are not conducive to their use. Spray or water spraying belt can be used for irrigation at the initial stage. Later, after the bracts turn red, it is best to do drip irrigation or bottom suction irrigation. Flowering control facilities: Yanlaihong is a short-day crop, and its critical day length is 12 hours and 20 minutes. If you want to delay the production period, you need to interrupt it in the dark period, which can facilitate automatic lighting at 22-02 midnight. Suitable temperature for germination: 25-30. Sowing date: suitable temperature for growth in spring and summer: 20=35. Flowering period: 7- 10. Seedling raising: the seeds should be protected from light, and the roots should be sown directly. If you want to transplant, it is advisable to surround the seedlings with soil when they grow 4-6 leaves, so as not to damage the root system. When sowing the seedbed, dig a ditch about 0.3 cm deep and 5 cm wide. After sowing, cover with 0.3 cm soil, keep the proper temperature and germinate for 4-6 days. Planting: Rich loam or sandy soil is preferred. Drainage and sunshine are better. Fertilize once every 20-30 days with three elements or soybean meal and bean cake water. Sufficient nitrogen fertilizer is needed to make the leaves bright. The flowerpot diameter is 15- 18CM, and the spacing between flower beds is 40VM.