Ok I’ll chime in too.
Dank do you PH your water? 6.4-6.8 is a good start with water going in. Plants will be much greener than that for nitrogen toxicity. When you said “ 3 cups of water a day” do you mean cups or SOLO cups? Either one is wrong or too much... pending on your temps you should have to water but every 3rd to 4th day. I grow in soil too but don’t use bottles. I use meal.
My advice, go buy an all purpose dry meal like DOWN TO Earth’s all purpose... 12$
Ph your water and give it to them every third day.... 24oz say on Thursday and then again on Sunday. Use the meal as your feed, don’t worry about veg food or flowering food...... we have to get your plants to finish and teach you how to do something correct. No sarcasm. Your plant looks pretty good but don’t water so often. Good luck, pay attention..... look at grow journals and take notes so you know who your dealing with