Hello. Why do the ovaries of cucumbers turn yellow in the greenhouse? I observe all the conditions for growing cucumbers. This was not the case last year.
If everything was all right in the greenhouse with cucumbers last year, there may be a lack of potassium in the soil. You can make top dressing with ash or mullein solution. For a faster result, spray, 3 tbsp. Spoons of ash on a bucket of water in the morning or evening. Ovaries can turn yellow from too high a temperature. Or maybe you have not planted a self-pollinated variety this year and you need to attract insects or manual pollination.