Growth habit of roses
Roses like sunshine, are resistant to shade and cold. It can be wintered in the open air in most parts of northern China. The requirements for soil are not strict, and it is drought-resistant and barren-resistant, but it grows well in deep, loose, fertile and moist soil with smooth drainage, and can also grow normally in cohesive soil. Not resistant to water and humidity, avoiding water accumulation. Strong germination, pruning resistance and pollution resistance.
The flowering period is generally from April to September every year, which is open in order and can last for half a year. Due to global warming caused by the greenhouse effect, roses in some places began to bloom in April or even March. Rosa is the general name of some plants of Rosa, which mainly refers to varieties of Rosa and horticultural varieties. Most of them are small flowers climbing fences like vines, and they are deciduous shrubs originating in China, with strong variability.
Stem spines are large and generally hooked, each node has about 3 or 4 alternate leaves, odd pinnate compound leaves, 5 to 9 leaflets, serrated leaves, flat but pilose leaves. Flowers are usually clustered with 6 to 7 flowers, which are cone-shaped corymbose inflorescences, born at the top of branches, with a flower diameter of about 3 cm, and only bloom once a year. The disk of Rosa davurica surrounds the mouth of calyx tube and has white, yellow and other colors.
After the flower fades, the sepals will fall off and the fruit will be spherical. Cold tolerance, there are many wild and horticultural varieties, which can be propagated by layering or grafting. Rose can be used as medicine, and the wild rose porridge made from it has good nutritional value. Mainly distributed in temperate, subtropical and tropical mountainous areas in the northern hemisphere.