2. I like an environment with sufficient sunshine, good air circulation, good drainage and shelter from the wind, and I need proper shade in midsummer. The optimum temperature of most varieties is 15 ~ 26℃ in the daytime and 10 ~ 15℃ at night. It is cold-resistant, and it goes into hibernation when the temperature is below 5℃ in winter. If the high temperature lasts above 30℃ in summer, the flowering and quality of most varieties will decrease, and they will enter semi-dormancy period.
3. Some varieties can tolerate low temperature of-15℃ and high temperature of 35℃; When the temperature keeps above 30℃ in summer, plants enter a semi-dormant state and grow poorly. Although it can bear buds, it has few petals and dull color, which loses its ornamental value.
Extended data
The main types of rose are edible rose, vine rose, big flower perfume rose, multi-flower rose, miniature rose, tree rose, strong flower rose, shrub rose and ground cover rose.
Rose flowers all year round, usually red and pink, and occasionally white and yellow. Can be used as an ornamental plant, but also as a medicinal plant, also known as rose. There are three natural varieties, and modern Chinese rose flowers are diverse, including single petals and double petals, as well as beautiful flowers, such as high-heart curls; Its colors are rich, including red, pink yellow, white and other monochromatic colors, as well as mixed colors, silver edges and other varieties; Most varieties have fragrance. There are many varieties of Chinese rose, nearly ten thousand in the world, and more than 1000 in China.
From August to April of the following year, the natural flowering period is large, spreading from the inside to the outside, and the fragrance is rich, which can be widely used in horticultural cultivation and cut flowers. Roses are adaptable and cold-resistant, and can be planted on the ground or potted. Suitable for beautifying courtyards, decorating gardens, arranging flower beds, arranging flower fences and flower stands. Roses are easy to cultivate and can be used as cut flowers, bouquets and various flower baskets.
Roses can extract essence and can be used as medicine. It also has good antifungal activity and synergistic antifungal activity.
References:
Baidu Encyclopedia-Rose