Tomatoes and cucumbers are planted in greenhouses at different times. Tomatoes are planted in March-May and cucumbers are planted in early February-March, so the requirements for temperature and humidity are different. In the process of planting in the open field, the smells emitted by different plants will be scattered with the wind and will not gather in a narrow space. Planting vegetables in greenhouse facilities will be different, because greenhouse facilities have certain tightness.
The "ethylene" smell emitted by tomatoes in the whole growth process is incompatible with the growth of cucumbers, especially in the closed and unventilated space of vegetable greenhouses. You can smell it directly with your nose. Cucumber is a vine crop. In order to make cucumbers grow well, we will use scaffolding to cultivate them. When the vines of cucumber grow very vigorously, the plump leaves will block some sunlight. Cucumber is easily eroded by aphids, and tomatoes are also favored by aphids. If these two crop species are together, aphids will be difficult to control, and spread quickly, which is more troublesome to prevent.
Secretions, hormones and gases produced during the growth of cucumber and tomato have mutual effects on the growth, such as affecting the ripening speed of tomato and so on. Therefore, cucumber and tomato should not be mixed. If two kinds of vegetables exist at the same time under the condition of high temperature and high humidity, it is easy to grow too vigorously and the disease is serious. Therefore, when cucumber and tomato are planted together, it will be difficult to adjust the temperature and humidity.