Generally speaking, the seeds in the watermelons we eat every day can also be made into watermelon seeds, but they are too small, so the watermelon seeds produced in the market usually come from special watermelon varieties, such as those in Lanzhou. Guagua, also known as seed melon, produces melon seeds with black edges and white hearts, full particles and large flakes, so it is known as "Lanzhou black melon seeds" or "Lanzhou large-scale melon seeds" in the international market. In autumn, when the seed melon is ripe, you can break it with your fist, eat meat, take seeds, wash it with water and dry it in the sun, and it can be listed.
Watermelon, watermelon can be called "the king of melons", originated in Africa. The Tang Dynasty was introduced to Xinjiang and the Five Dynasties to China. It belongs to Cucurbitaceae and has many seeds. Watermelon is cultivated in both north and south of China. Watermelon is a dicotyledonous flowering plant with vine-like appearance and feathery leaves. Its fruit is Zanthoxylum bungeanum, which is a kind of fleshy fruit unique to Cucurbitaceae. It is a false fruit developed from three lower ovaries, with carpels and placentations. The main edible part of watermelon is the well-developed placenta. Fruit skin is smooth and green or yellow, pulp is juicy and red or yellow, and white pulp is rare. Watermelon is cold and sweet; It has the effects of clearing away heat, relieving summer heat, promoting fluid production, quenching thirst, promoting diuresis and relieving vexation. It is helpful to treat chest and diaphragm qi obstruction, fullness and discomfort, dysuria, mouth and nose sores, summer heat and heatstroke, hangover and other symptoms. Skin can also be used for cooking and medicine.