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Experts do not advise growing cucumbers and tomatoes in the bottom greenhouse, since they require different microclimate. High humidity, which is favorable for cucumbers, causes a sticking of pollen in tomatoes and a poor tie of fruits. If there is no room for the second greenhouse or greenhouse, part of the available greenhouse is fenced off with plastic film, which leads to an increase in humidity and the absence of drafts. In the "tomato" part of the greenhouse there will be ventilated dryness, ideal for tomatoes. In such greenhouses, you need to change cucumbers and tomatoes every year every year, as well as from time to time to update the earth.