What does rotten nine yellow mean?

In the southwestern region, there are continuous rains in September, which causes the newly born leek sprouts to rot, so it is called rotten leek yellow, also called rotten nine yellow. This is talking about the weather, not the tender leeks that some yellow-mouthed children say.

Leek yellow refers to "leek buds", "yellow leek buds", "yellow leek", etc., commonly known as "leek white". It is the product of leeks that turn yellow after being softened and cultivated. Leeks are cut off from light and grow completely in the dark. Without sunlight supply, they cannot produce photosynthesis and synthesize chlorophyll, which turns yellow, which is called "leek yellow". It is yellowish-white because it has not seen sunlight, and its nutritional value is inferior to that of leeks.

Extended information

The roots of leeks are quite special. There is no distinction between main roots and lateral roots. There are fewer root hairs and only fatter, string-like fibrous roots. They are planted in the year of sowing. The base of the rhizome disc; grows around and on one side of the rhizome disc in the second year. The fibrous roots are about 30 cm in length and are mainly distributed in the soil layer 20 cm below the topsoil.

It shows that the ability of the leek root system to absorb water and nutrients is relatively poor. The rhizome is gourd-shaped and grows in the soil. It is an organ that stores nutrients. The growing point at the top can tiller in the year of sowing. The bulbs of annual leeks are oblate, while the bulb discs of biennial plants begin to elongate and continue to produce new roots, and the new roots are located toward the outside.

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