cucumber color

Question

This is my first time growing cucumbers. I have 3 different types. One is climbing a wall and hasn’t produced any cucumbers yet. The other 2 have. One of them is all on ground and all cucumbers are shaped more like a gourd and are mostly yellow and never turn green. The ones on the other vines on the ground are like that too but the ones climbing the fence so far are looking normal and turning green why?

Answer 1

Deformed cucumbers are caused by poor pollination. If the pollination was poor enough, the vine would abort the fruit (the yellowing being the fruit dying).

This article has more information on deformed cucumbers:
https://www.gardeningknowhow.com/edible/vegetables/cucumber/deformed-cucumbers.htm