I have a cucumber plant amongst other things in my greenhouse. Do I need to pollentate it? Or will it still grow. My tomatoes have done fine and I haven't done anything to them...
Yes, you will need to pollinate your cucumbers.
https://www.ces.ncsu.edu/depts/ent/notes/Beekeeping/bee7b.html
https://www.pollinator.com/hand_pollination.htm