Blueberry is a plant of the Rhododendron family, Vaccinium myrtillus, with cylindrical green branchlets, oval leaves, and spherical blue berries.

Blueberry tree size and form up to 10 meters, often controlled in cultivation at about 3 meters, while the shortest tree height of only 5 to 15 cm. Blueberries flower in racemes, with inflorescences mostly lateral and sometimes terminal. Usually consisting of 7 to 10 flowers, the flowers are bisexual, solitary or double in the leaf axils, actinomorphic or bilaterally symmetrical.

Blueberry leaves are evergreen or deciduous, alternate, sparsely opposite or whorled, entire or serrate, and without stipules. Most blueberry species have downy hairs on the back of their leaves, and some even have downy hairs on their flowers and fruits.

Blueberry fruit size and color vary by species. Most varieties have blue-colored fruit at maturity, with an average individual fruit weight of 0.5 to 2.5 grams and a diameter of 0.8 to 1.5 centimeters. Blueberry fruit generally ripens 70 to 90 days after flowering. The flesh is soft and juicy. It is sweet and tart and has a pleasant aroma. The seeds are tiny and can be eaten with the flesh without affecting the flavor.

Blueberry varieties:

1, highbush blueberry: the variety of fruit is very large, can be divided into the South Highbush blueberries and the North Highbush blueberries two kinds of the former like to grow in the wet and warm environment, suitable for the central China, South China and other areas for the The former prefers to grow in a moist and warm environment and is suitable for planting in areas such as central and southern China, while the northern highbush blueberry prefers a cool environment and is suitable for planting in northern areas.

2, half-highbush blueberry: half-highbush blueberry is a cross between highbush blueberry and shortbush blueberry varieties, its tree is relatively short, height of about 50 to 100 centimeters, the fruit is large, good quality.

3, dwarf bush blueberry: dwarf bush blueberry alias wild blueberry, wild dwarf bush blueberry. Listed by the International Food and Agriculture Organization as one of the five health food for human beings, with "the king of the world's fruits" and "golden fruit" reputation.

4, Baldwin: Baldwin belongs to the U.S. varieties, the fruit is not only large and hard, dark blue, dry and small tip marks, taste better.

5, garden blue: garden blue is the United States in 1958, Georgia published varieties, the fruit in the grain, sweet taste is more, acidity is very little, there is a fragrance, less fruit powder, the skin is relatively hard.

6, powder blue: powder blue is the United States in 1978, North Carolina published varieties, medium-sized grains of fruit, very hard flesh, scented, bright blue peel, more fruit powder.