Off-season cultivation techniques for tomatoes

We all know that tomatoes are generally grown in spring, so what should we pay attention to if we grow them off-season?

1. Tomato planting season:

The supply period of off-season tomatoes in South China is generally from June to October. The sowing time is from March to June, and the planting period is from April to July. Those planted before early April and after late July can be planted in mountainous areas with an altitude of 300 to 500 meters. Those planted from mid-April to mid-July can generally be planted in mountainous areas with an altitude of 500 to 700 meters.

2. Tomato variety selection:

For summer tomato cultivation, varieties that are heat-resistant, disease-resistant, vigorous, not prone to premature aging, resistant to storage and transportation, resistant to fruit cracking, good quality, high yield, and popular should be selected. Such varieties include Fengshun, Yifeng, Xinxing 101, Nianfeng, Xiahong No. 1, Dafengshun, etc. Varieties that are not resistant to bacterial wilt, such as Jinfeng No. 1, Mingzhu, Hongbaozi, Shengnu, etc., can be used as off-season cultivars in areas where bacterial wilt is not prevalent, but should not be used as cultivars in areas where bacterial wilt is more serious. Varieties should be selected according to local conditions, and promotion should be carried out after successful trial planting on a small scale.

3. Field management:

During the growth period of summer tomatoes, it is a season of high temperature and high humidity, frequent typhoons and heavy rains, or high temperature and scorching sun exposure, and pests and diseases are serious. Therefore, you should choose a field that has not been planted with nightshade vegetables for 2 to 4 years, and use deep furrows and high ridges to facilitate drainage. The base fertilizer should increase the ratio of phosphorus and potassium, and control the amount of nitrogen fertilizer. At the same time, plant appropriately close to provide mutual shade, reduce and stabilize soil temperature, and facilitate root growth.

After planting, you can cover the bed with straw and then add soil on top to prevent the soil from hardening after rain, reduce water evaporation, inhibit the growth of weeds in the field, and reduce the occurrence of diseases. During the entire growing period, you only need to weed and add soil, no inter-cultivation is required, and you must set up the frame early. Summer tomatoes are generally pruned with two stalks, and more branches and leaves are retained on the upper part of the plant to prevent the fruit from being exposed to direct sunlight and causing sunburn.

High temperature will cause flowers and fruits to fall off. Depending on the growth of the plants, 2,4-D 10-15 mg/L or PCDA 25-30 mg/L should be used to protect flowers and fruits in a timely manner. The soil should be kept moist, and topdressing should be done in time. After the fruit is set, more fertilizer should be applied frequently. At the same time, the occurrence of navel rot should be prevented, and 0.2% calcium dihydrogen phosphate can be sprayed on the leaves.