Catharanthus roseus is also known as alum flower, spring flower, Japanese grass and five-petal plum. It is a perennial herb or semi-shrub, and is usually cultivated as an annual herb flower. Catharanthus roseus is 30 ~ 60 cm high, with erect stems, woody base and many branches on the upper part. The leaves are opposite, membranous, oblong to obovate, blunt at the apex, tapering at the base, dark green and shiny, and the main veins are white. Cymes, axillary or terminal. The corolla is butterfly-shaped and the petals are meristematic. Each branch has 2 ~ 3 flowers and the stem is 3 ~ 4 cm. Catharanthus roseus has many colors, such as pink, deep rose, white and multicolor, as well as white flowers and hearts. Potted plants in greenhouses can bloom all year round. The general flowering period is from June to 65438+ 10. Fruit is a fruit, which is easy to crack and fall off when it is ripe. The fruit ripens from September to frost. The seeds are nearly irregular cylindrical, with 700 seeds per gram.

Catharanthus roseus has strong adaptability, few pests and diseases, neat growth, lush leaves and continuous flowering period, and can be used as flower beds or flower borders and potted plants for viewing. In the southern region, it can also be planted as a forest edge. Catharanthus roseus is a good material for arranging flower beds and reading glasses in summer and autumn.

Catharanthus roseus likes warm, humid and sunny environment, and avoids dry heat, cold and frost. The requirements for soil are not strict, and it grows best in sandy loam rich in humus.