There are two kinds of branches formed by calcareous fruit every year, one is the new branch that grew on the branch the year before, and the other is the new branch that sprouted from the bud at the base of the underground branch, which is called the base branch. There are obvious differences in growth potential and fruiting ability between the two branches. The basal branches are strong and erect, and the growth height can reach 70 cm in that year, which is the main branch of the plant cluster. The upper branch comes from the basic branch and plays the role of crown expansion. It is generally inclined or horizontal, with a length of 30-50 cm, thin thickness and weak growth potential. The higher the branching level, the weaker the branching growth potential and the worse the fruiting ability. There is also a kind of root-tiller seedling that grows from adventitious buds on the roots, which can form new plants and new clusters and play a role in plant reproduction and expansion. Basic branches and roots and tillers are the basis of sustained high yield of calcium fruit.
There is also a kind of underground stem, which generally grows horizontally in the range of 10-20cm below the ground. It is white and sticky at the beginning and turns light brown at the later stage. When it grows to 40- 100cm, it can often be drilled out of the ground to develop new plants. Calcium nuts have strong adaptability, the annual average temperature is 4.8- 16.6℃, the absolute minimum temperature is higher than MINUS 30℃, the annual rainfall is not less than 400 mm, the annual sunshine hours are more than 2,400 hours, the altitude is below 1650 meters, the frost-free period is above 130 days, and the monthly average temperature in winter is below 7.2℃.