Brief introduction of Rosa davurica.

Morphological characteristics:

Roses belong to deciduous shrubs, with clustered plants, spreading or climbing, slender branchlets, not erect, often spiny and hairless. Leaves alternate, odd pinnate compound leaves, 5-9 leaflets, obovate or elliptic, sharp apex, sharply serrated edges, pubescent on both sides, pubescent or glandular hairs on leaf axis and stalk; Stipules are connate with the base of leaf axis, with toothed edges and glandular hairs.

Roses are clustered into conical cymes, with many flowers, and the flower diameter is 2~3cm. There are 5 petals, the apex is slightly concave, the wild rose is single petal, and there are also double petal cultivated varieties.

Flowers are red, white, pink, yellow, purple, black and other colors, most of which are red, and Huang Qiangwei is the top grade with fragrance.

Roses bloom once a year, from May to June. The fruit is nearly spherical, reddish-brown or purple-brown, about 6mm in diameter, smooth and hairless.

Ecological habits:

Roses like sunshine, are resistant to shade and cold. It can be wintered in the open air in most parts of northern China.

Rose has low requirements on soil, and is drought-resistant and barren-resistant, but it grows well in deep, loose, fertile and humid soil with smooth drainage, and can also grow normally in cohesive soil. Not resistant to water and humidity, avoiding water accumulation. When planting new plants, decomposed organic fertilizer should be applied.

In the first year or two after frost planting, basal fertilizer can be applied once a year in late autumn to facilitate the growth and flowering of roses. 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.