Broccoli can be planted in the open air after Qingming in spring. Around April, the temperature is just right for broccoli to germinate, and autumn is generally in late summer and early autumn. Cultivation in Beijing in spring and autumn. Generally, it is sown in early April, harvested in late May and sown in early autumn and August.1harvested in early October 165438. Seven health benefits of broccoli 1. Prevent cancer. Like broccoli, Brussels sprouts, white radish, cabbage and other cruciferous vegetables, broccoli has anti-cancer and immune enhancement effects. 2. Reduce blood fat. Broccoli is rich in soluble fiber, which helps to remove intestinal waste, reduce cholesterol level and control blood lipid. 3. Allergy prevention. It is found that the active substances in broccoli can reduce the impact of allergens on human body and reduce the risk of allergies. 4. Anti-oxidation. Broccoli is rich in carotenoids, lutein, zeaxanthin, beta carotene and other strong antioxidants. 5. Strong bones. Broccoli is rich in calcium and vitamin K, which plays an important role in bone health and osteoporosis prevention. 6. Protect your heart. The sulforaphane isothiocyanate in broccoli has anti-inflammatory effect, which can prevent vascular injury and protect the heart. 7. Help to lose weight. Buried broccoli is rich in dietary fiber, which is beneficial to digestion, preventing constipation, lowering blood sugar and preventing overeating, thus achieving the purpose of losing weight. Extended data: Western flower cultivation conditions: 1. Light does not require strict light, but it likes sufficient light during growth. When the light is sufficient, the plant will grow vigorously and form a thick curved cavity vegetative body, which is beneficial to photosynthesis and nutrient accumulation, making the flower ball compact, compact, green in color and good in quality. Too much sunshine in midsummer is not conducive to the growth and development of this flower. 2. When the temperature is in the range of 5~20℃, the higher the temperature, the faster the growth and development of orchids. The optimum germination temperature is 20~25℃, and the optimum growth temperature at seedling stage is 15~20℃. Western flowers have strong cold and heat resistance. The optimum temperature for rosette growth is 20~22℃, and the optimum temperature for bulb development is 15~ 18℃. When the temperature is higher than 25℃, the quality of bulbs tends to deteriorate, but as long as they are not damaged by freezing, bulbs can still grow slowly at 5℃ or even lower. Different varieties and seedling ages have great differences in temperature requirements for vernalization, so it is very important to choose varieties in annual cultivation. 3. Cymbidium hybridum needs a lot of water in the whole growth process, especially in the period of vigorous leaf growth and flower ball formation. Even a short-term drought will reduce production. Rainy seedlings or high soil moisture are easy to cause diseases such as black rot and black spot. The soil moisture and 70~80% field capacity at flowering stage can meet the growth needs.