Bluegrass is a kind of plant that can make indigo, and it is the general name of many plants that can make indigo dye and dye cloth. You can't confuse bluegrass with bluegrass. They are completely different in appearance, family, composition and name. In fact, blue and blue grass are ancient names, and modern folks generally call them indigo.

Indigo has been loved by people for thousands of years because of its rich colors, gorgeous but not flattering, dignified and confident. The quaint and elegant style of indigo can be seen on all the fabrics and folk handicrafts unearthed in China.

With the improvement of environmental awareness, natural plant fiber fabrics and finished products dyed with blue grass are increasingly favored by modern people and become an important part of fashion.

Extended data:

Blue grass likes wet, slightly sunny places, and the dyeing part is leaves. It is also called Abolan and Wulan in Japan. The propagation method can be sowing in late March and early April, or planting the stems of Polygonum hydropiper directly in the soil.

It is best to harvest the seeds when the flowering part turns brown and black in 1 1 month. After harvest, it should be dried, put in plastic bags, and then refrigerated in the refrigerator until the next spring. After picking leaves, new leaves will grow on the stem nodes.

Therefore, it can be propagated in a large number in potted plants with cultivated soil, and can also be propagated with stems after use. But pay attention to fertilization. Without fertilization, the leaves will gradually become smaller.