How many times a year does a blueberry flower and bear fruit, and how many berries can one flower bud produce?

Blueberries are quite popular because they are rich in vitamins and pectin, and regular consumption can help boost immunity and speed up blood circulation, so they are grown in many places. Then “the holy fruit of the mortal world” the blueberry, how many times a year does it flower? How many times does it bear fruit? How many berries can one flower bud grow?

A blueberry flowers once a year and bears fruit once a year. It generally begins to flower and bear fruit in the 2nd year, but by comparison the yield will be very small. It is not until the 3rd year that normal yield can be reached. So if growers are raising new blueberry seedlings, they should not be too impatient. By the fifth year, the blueberry seedlings can enter the full-production period. Basically each clump should have 25-30 fruiting branches, and each plant can produce an average of 3 to 6 kg of blueberries, with each blueberry weighing about 2 grams. According to statistics, if 300 blueberry seedlings are planted per mu of land, the average yield can reach 1500 to 2000 kg.

The specific flowering time and fruiting time are:

Blueberry flowering time: The flowering period of blueberries is from February to April each year. In spring, 3 to 4 weeks after the flower buds of blueberries break dormancy, the full-bloom stage arrives, and at the same time the leaf buds also grow to their proper length. So whenever March and April come around, you can see blueberry flowers in full bloom.

Blueberry fruiting time: Blueberries originated in North America, and today nearly 90% of the world's blueberry products come from North America. The harvest season in North America is from mid-April to early October, with the peak of the harvest in July, so July is also known as National Blueberry Month. Cultivated varieties require 120-160 days of frost-free weather for the fruit to ripen.

How many fruits can one flower bud grow?

The flowers of blueberries are racemes. One flower bud will produce a cluster of flowers, generally able to set about 10 or so fruits, with differences depending on the variety.

Attached cultivation techniques:

1. Reasonably choose the planting site and varieties

A blueberry planting plot needs sufficient sunlight and good ventilation, loose soil, convenient drainage and irrigation, a slope within 10 degrees, a pH value between 4-5, and a relatively high organic matter content, which needs to be above 50 grams per kilogram. If the soil has a relatively high pH value, blueberries will suffer from iron deficiency as they grow and are prone to death problems; while if the soil pH value is too low, it will cause heavy metal poisoning in blueberries. If the soil has too high a pH value, it can be adjusted with the help of sulfur powder, etc., and the soil organic matter should be appropriately increased at the same time. If the soil has only a relatively low organic matter content, then the soil needs to be improved; peat soil, sawdust, and crop straw are all good choices. The planting varieties should be reasonably determined by fully combining factors such as local climatic conditions and production uses. In northern regions and high-cold regions, cold-tolerant lowbush blueberries and northern highbush blueberries can be planted, while southern highbush blueberry and rabbiteye blueberry varieties can be planted in the hotter southern regions.

2. Reasonably determine the cultivation season and cultivation density

Blueberries can be planted in both spring and autumn, among which the best choice is autumn; if planting in spring, it should be done as early as possible. Generally, planting blueberries at 2a seedling age is better. Combined with the variety, reasonably determine the plant and row spacing; lowbush blueberry, highbush blueberry, and rabbiteye blueberry are respectively 1m×1m, 1.2m×2m, and 2m×2m. As for pollinator varieties, rabbiteye blueberry is mostly self-pollinating, but its fruit-setting rate is relatively low, so highbush blueberry can be chosen as the pollinator variety. Highbush blueberry and lowbush blueberry have relatively high self-fruit-setting rates, and through the arrangement of pollinator varieties, their yield and quality can be improved. Determine the configuration ratio of the main cultivated variety and the pollinator variety according to the standard of 1:1 or 1:2.

3. Fertilizer and water management

Blueberries have relatively low nutritional needs, so fertilizer must not be applied excessively, otherwise it will affect the normal growth of the plants; generally, blueberry fertilization is carried out twice a year. The first fertilization is carried out before budding in early spring, and the second fertilization is carried out during the berry ripening stage. Furrow application and hole application are among the more commonly used fertilization methods. Usually, the furrow application method is used to fertilize rabbiteye blueberry and highbush blueberry, with the furrow depth controlled according to the standard of 10-15 cm; after lowbush blueberry forms a continuous patch, the broadcast application method is adopted. Compared with single fertilizers, nitrogen-phosphorus-potassium compound fertilizer has greater advantages; if the soil has a relatively high organic matter content, nitrogen fertilizer can be appropriately reduced. The blueberry root system is distributed at a relatively shallow depth, so watering should be frequent to help maintain the soil in a moist state. During the rainy season, drainage work needs to be done well.

4. Pest and disease control

Because China only introduced blueberries in the 1980s, there are not many pests and diseases. Powdery mildew, downy mildew, etc. are common diseases. In the process of pest and disease control, carry out orchard cleaning treatment, remove the dead branches and fallen leaves in the orchard, and through deep plowing of the soil, remove diseased leaves and insect eggs, helping to reduce the overwintering base of pests and diseases. During the blueberry growing period, fungicides and insecticides are mainly sprayed to help effectively prevent and control blueberry pests and diseases.