How many crops of greenhouse tomatoes are planted in a year?

Tomatoes are rich in nutrients and have great market demand. When grown in greenhouses, they have high yield, good quality and high efficiency, making them very popular among growers. So how many crops of greenhouse tomatoes should be planted in a year? Let’s take a look below.

1. How many crops of greenhouse tomatoes are planted in a year?

Greenhouse tomatoes can be planted twice a year, early in spring and late in autumn. The early spring crop is usually raised in mid-to-late December of the previous year, planted in early to mid-March, and harvested from mid-to-late April to mid-to-late June. For the autumn extended crop, seedlings are raised in mid-June, transplanted in mid-July, and harvested in early to mid-October or mid-to-late November.

In addition, there are special planting modes that can achieve three harvests. Through special technical means, such as buried stem regeneration technology, it is possible to achieve three harvests of greenhouse tomatoes after one planting.

2. How to grow tomatoes in a greenhouse?

1. Choose good varieties

When growing tomatoes in a greenhouse, you must first choose varieties that are resistant to low temperatures and weak light, easy to set fruit, and meet market demand. Common greenhouse tomato varieties include Summer Sunshine, Fangu No. 1, Israel No. 6, Xiweimei, Provence, Kaihong 414, Yellow Roman, Millennium, Emerald, etc.

2. Greenhouse treatment

Greenhouses need to be thoroughly disinfected before planting to reduce the occurrence of diseases and pests. At the same time, check and repair greenhouse facilities to ensure the normal operation of ventilation, insulation, irrigation and other systems. According to the growth habits of tomatoes, rationally plan the planting area, set appropriate planting density and row spacing, and create a good environment for plant growth.

3. Cultivate strong seedlings

Cultivating strong seedlings is a prerequisite for obtaining high-quality and high-yield tomatoes. Before sowing, treat the seeds. Sow the germinated seeds evenly on the seedling tray or seedling bed, cover with a thin layer of soil and keep the soil moist. The temperature of the seedbed is controlled within an appropriate range, generally 25-30℃ during the day and 15-20℃ at night, to promote rapid germination of seeds. After germination, timely ventilation should be carried out to prevent the seedlings from growing too tall. When the seedlings grow to 6 to 10 leaves, they can be prepared for transplanting.

4. Planting

Before planting, the greenhouse soil should be deeply plowed and fertilized, and well-rotted organic fertilizer and appropriate amount of compound fertilizer should be applied. Generally, 10,000 to 20,000 kilograms of fully decomposed organic fertilizer and 100 to 150 kilograms of 51% compound fertilizer should be applied per mu to provide sufficient nutrients for plant growth. With a maximum row spacing of 80 cm, a minimum row spacing of 50 cm, and a plant spacing of 30 to 33 cm, 3,000 to 3,500 plants are planted per mu.

5. Temperature and humidity management

The temperature and humidity in the greenhouse are high, which has a great impact on the growth of tomatoes. During the growth period, the temperature and humidity in the greenhouse should be adjusted in time according to weather changes and plant growth needs. The daytime temperature is generally maintained at 25-30℃, and the nighttime temperature is maintained at 15-20℃. At the same time, attention should be paid to ventilation to reduce the humidity in the greenhouse and prevent the occurrence and spread of diseases.

6. Fertilizer and water management

Tomatoes have a long growth cycle and require a lot of fertilizer. After planting, topdressing should be carried out in time according to the growth of the plants. Topdressing should be carried out during the flowering and fruiting period and the peak fruit-bearing period. Generally, 10 to 15 kilograms of 50% macro-element water-soluble fertilizer can be used per mu each time. At the same time, foliar fertilizer should be sprayed regularly to promote fruit development and improve quality.

7. Plant adjustment

In order to improve yield and quality, necessary adjustments need to be made to tomato plants. When the plant has too many branches, it is necessary to cross them to increase ventilation and light transmission and reduce nutrient consumption; when there are too many fruits, the flowers and fruits need to be thinned out to concentrate nutrients on high-quality flowers and fruits and improve fruit quality.

8. Pest and disease control

In the process of greenhouse tomato cultivation, the prevention and control of diseases and pests is particularly critical. A combination of agricultural and chemical control can be used. Strengthen field management, rotate crops rationally, reduce sources of pests and diseases, and at the same time, spray pesticides regularly to ensure healthy growth of plants.

Growing tomatoes in a greenhouse requires selecting good varieties, disinfecting the greenhouse, cultivating strong seedlings, planting them properly, controlling temperature and humidity, managing fertilizer and water, adjusting the plants, and preventing diseases and pests. By doing this, you can achieve high yield and high quality.