The first is the temperature. Generally speaking, the daytime growth temperature of cultivated varieties is 18-25℃, and the nighttime growth temperature is 10- 15℃. When the temperature exceeds 30℃, it will grow poorly, and when it is lower than 5℃, it will enter a dormant state. At noon in midsummer, you need proper shading to help cool down.
In the sun, roses thrive in plenty of sunshine. Generally, it takes more than 6 hours of light every day to grow and develop normally. In summer, in order to avoid strong light, shade properly to reduce the light intensity.
The third is moisture. Roses like humidity, but they can also tolerate a certain degree of drought. The principle of watering is to dry thoroughly and water thoroughly. Water before 10 am in spring, summer and autumn, and water before 1-2 pm in winter. It is required that the water temperature be slightly lower than the soil temperature in summer and slightly higher than the soil temperature in winter, which is beneficial to root system development.
The fourth is fertilizer. Roses are like fertilizer. In order to make it blossom month by month, it is necessary to constantly fertilize and ensure adequate nutritional conditions. Pay attention to the season, variety, etc. When applying fertilizer, avoid applying undeveloped fertilizer and concentrated fertilizer. Master the principle of "thin fertilization", timely and appropriate topdressing according to the actual growth of plants to supplement the nutrients lacking in the soil.
The fifth is the soil. Roses like soil rich in organic matter, loose and fertile, slightly acidic (ph6.5-6.8), good aeration and granular structure. Poor drainage and soil hardening will hinder growth and even death. Soil containing a lot of calcium will affect the absorption and utilization of some trace elements by roses, which often leads to yellowing.
The sixth is air. Roses need air circulation in the environment, and the stuffy and unventilated environment is not good for their fertility. The air is too dry, the young leaves are prone to deformity, and the air is too humid, which is prone to powdery mildew. The optimum air humidity is 75%-80%.
As long as the above conditions are met, roses can bloom frequently and beautifully every month.
Through our introduction, I believe everyone has a deeper understanding of how to raise the roots of Chinese rose.