Mustard greens will bloom in October, which is the heart of the flower, and will bloom next. "October mustard" describes the beginning of love between boys and girls. October is when shepherd's purse blooms and bears fruit. The stamens are generally high and very neat. In the local dialect, the stamens are also called the heart of the flower, hence the saying.

The origin of October mustard

1. Mustard is one of the main vegetables in Guangdong, generally divided into spring (late February) and summer (early July to late August) There are three cultivation times: autumn (early September to early October). Among them, those cultivated in spring will start to produce buds and seeds in autumn (about October).

2. Among both genders, girls generally mature sexually earlier than boys, undergo physiological and psychological changes earlier than boys, and awaken to the love between men and women faster than boys.

3. Therefore, the so-called "qixin" here refers to the psychological changes of girls when they mature sexually, which corresponds to the period when mustard buds are pregnant and the flower heart grows.

4. Therefore, Guangdong folk use the growth process of a common plant such as mustard to describe the state of spring (sexual awakening) of girls (girls).

The growth cycle of mustard

Mustard is a brassica of the Cruciferae family. It is an annual or biennial herb. It is a famous specialty vegetable in China. It is native to China and is grown all over the country. Commonly cultivated vegetables are mostly distributed in the provinces south of the Yangtze River. The main lateral roots of mustard are distributed in a soil layer of about 30 cm. The stems are shortened stems, and the leaves are attached to the shortened stems, with shapes such as ellipse, oval, obovate, and lanceolate. The leaves are green, dark green, light. Green, yellow-green, green interspersed or purple-red.

It is rarely cultivated in European and American countries and originated in Asia. Li Shizhen's "Compendium of Materia Medica" records the medical value of medical mustard. Mustard prefers cool and moist conditions, avoids heat and drought, and is slightly tolerant of frost. The average temperature suitable for seed germination is 25℃.

The most suitable temperature for the growth of leaves is 15°C, and the most suitable temperature for the growth of edible organs is 8-15°C. However, the requirements for the formation of edible organs of stem mustard and mustard are lower. Temperature, generally leaf mustard has less strict temperature requirements.