Pear matures from September to October. During fruit growth and development, the early stages are mainly cell division and tissue differentiation, and the later stages are cell enlargement and pulp maturation. The fruit volume growth curve is S-shaped. Pear root growth has two growth peaks every year: the first growth peak occurs when new shoots stop growing; the second growth peak occurs from September to October. Under suitable conditions, the pear root system can grow year round without a dormant period. Because pear trees are widely distributed, their phenological stages vary greatly. In terms of flowering period, pear trees generally bloom in early to mid-February in Huili, Sichuan, and the flowers are white, and bloom in mid-May in Yanbian, Jilin; Yali trees bloom in early March in Changsha, Hunan, and early May in Beizhen, Liaoning. The flowering period varies from place to place by nearly two months. Pear trees cultivated in the same area have different phenological stages due to different types and varieties. From bud germination to flowering, the Qiuzi pear variety is the earliest, the white pear variety is later, the sand pear variety is later than the white pear variety, and the Western pear variety is later. The variety is the latest and the variation range is about 10 days.

Extended information: Modern research shows that in addition to 85% water per 100 grams of pear (referring to the pulp), it also contains a variety of nutrients indispensable to the human body, such as protein, fat, carbohydrates, minerals. Substances such as calcium, phosphorus, iron, multiple vitamins and organic acids such as citric acid, malic acid, etc. Pear pulp contains glycosides and tannic acid, which have the functions of moistening the lungs, relieving cough, resolving phlegm, nourishing blood, etc. It can treat dry throat, sore throat, hoarse voice, thick phlegm, constipation and urination caused by tuberculosis, upper respiratory tract infection and acute and chronic bronchitis. Red, etc., regular consumption of pears can relieve symptoms and promote recovery. Pears have antihypertensive and sedative effects. People with high blood pressure and heart disease who suffer from excessive liver yang or inflammatory liver fire and often eat pears can make their blood pressure drop, dizziness, dizziness, and heart palpitations disappear. The polyphenols bioactive substances contained in pears can promote the body to excrete carcinogens polycyclic aromatic hydrocarbons and their metabolites. After eating foods that are prone to carcinogens such as pickles and barbecue, eating a pear or drinking a glass of pear juice will help resist the damage of toxic substances. Pears can promote gastric acid secretion, protect the liver, aid digestion, and increase appetite. Patients with hepatitis and cirrhosis who often eat pears can increase their appetite and improve their spirits.