When plants encounter adverse environmental conditions during their growth and development, some will temporarily stop growing, which is called "dormancy". For example, after buds, bulbs and tuber vegetables mature, a large amount of nutrients are accumulated in the body, protoplasm changes, metabolism level decreases, growth stops, water transpiration decreases, respiration slows down, and all life activities enter a relatively static state, so as to increase the resistance to adverse environment. Vegetables with dormancy will germinate when they come out of dormancy, which will reduce the weight and quality of their tubers. For example, when potatoes begin to germinate after dormancy, not only the surface of potato blocks shrinks, but also an alkaloid is produced, which is harmful to human body when eaten; The meat quality of onion, garlic seeds and ginger will become empty and dry after germination. After garlic seeds are harvested, the dormancy period is generally 2~3 months. After the dormancy period, garlic seeds will germinate and grow leaves quickly at a suitable temperature, consuming nutrients in the stems, leading to bulb atrophy, shriveled, greatly reduced edible value and even rotted. Therefore, although germinated garlic seeds can be eaten, their edible value will be greatly reduced because of their nutritional consumption. In addition, the nutritional value of garlic is introduced: garlic contains trace elements and vitamin C beneficial to human body, which has certain nutritional and health care functions. Garlic is rich in allicin, which can inhibit bacteria and disinfect. Moreover, garlic not only has the well-known antimicrobial effect, but also plays an important role in anti-hypertension, anti-thrombosis, anti-cancer and anti-aging.