1, seedling age: the Netherlands bean seedling age seedlings have 4 - 6 true leaves, thick stems and sections short, no lodging. To reach the above-mentioned calendar seedling age, different seedling temperature conditions will vary: 20 to 25 days at high temperatures (20–28°C); 25 at moderate temperatures (16–23°C) - 30 days; 30 to 40 days at low temperature (10-17 °C). 2. Seedling raising methods: According to conventional breeding methods, container seedlings should be used. Pouring water before sowing, dry seeds sowing, each seedling 2 - 4 seeds. Early maturing varieties are broadcasted, late-maturing varieties are sown, and after the soil is covered, soil is preserved. After the broadcast, the temperature is controlled at 10-18°C, which is conducive to quick emergence and emergence of seedlings. Slow temperature and low germination should strengthen insulation. Temperature is too high (25 - 30 °C) germination, although fast, but it is difficult to protect the whole seedlings, should be moderate shade. Cotyledon temperature should be lower, 8 - 10 °C is appropriate. Before planting, the seedlings should be subjected to a low temperature of about 2°C to facilitate the development of the vernalization stage. The seedlings are generally not seedlings during the seedlings and do not water when they are not dry. Zhuhai Mingke Electronics Technology Co., Ltd , https://www.mingke-tech.com