is there any substitute of sunlight
I have planted different flowering vines at my office, but the problem is that all of them are in shade and don't get direct sunlight at all. I regularly fertilize them. Is there any medicine or chemical which can cover the work of sunlight? All plants are growing but none of them are flowering.
Probably the best thing you could do is to rig up a grow light or two that would shine upon them. That should get you the performance you desire. There really is not anything I know of chemical wise that would get the same performance that I am aware of. Here are a couple of links to articles that might be of interest to you as well: https://www.gardeningknowhow.com/plant-problems/environmental/how-light-affects-the-growth-of-a-plant-problems-with-too-little-light.htm