This is my first time growing and I have 5 plants that are growing really good but one of my plants have developed yellow tips but doest look bad at the moment. I need advice on what stage my plants are in and if I should move them out of the solo cups now or if they are ok for now. They are growing indoors except for when it is nice outside, I take them out for some sunlight. I keep them under light pretty much the whole time except for maybe 4-6 hours of complete darkness. Please take a look at my pictures and tell me what you think, any help would be appreciated. Thanks