I'm learning to garden and have successfully grown bottle gourd and zucchini. I also planted cucumbers but they are turning yellow and I cannot figure out what is wrong. I have looked at a variety of information on the Internet and some of it is conflicting.
For example, in this video yellow is because of rain, while in this video yellow is because of sun. The place where I have planted this gets sunlight directly three hours a day. And then the rest of time it is in shade. The weather here is 90-100°F (32-38°C). There have been showers every evening for about 30 minutes for the past three days but the cucumbers started turning yellow even before that.
There are links which say that there may be problems with magnesium deficiency and also nitrogen. So I have sprayed it with epsom salt and also provided the NPK mixture. It does not make any difference. I'm attaching a photograph of one of the cucumbers that is turning yellow.
The other vegetables like bottle gourd and zucchini are planted in different beds a few feet away and they are growing nicely. Both have the same kind of soil.
So it is pretty perplexing.