Aurora Indica 3 weeks into flower

Hi all my ai is 3 weeks into flower and the bottom leaves have turned yellow, curled, and fallen to the ground. I'm guessing over watering or N deficiency. They were beginning to turn yellow a week ago so i stopped watering for 5 days because the soil never seemed to dry out and they seemed to get better but not worse so i watered them with fox farm big grow and with some bat guano and now they look like this. any help please

that plant is not getting the proper light cycle. If you have been flowering it for 3 weeks and it is that overtly in vegetation, then something is wrong. If you're not using HPS lights and sealing the light out during dark times (12 hours a day) then it will likely not flower. Make sure your grow room is light tight. The Hps isn't as necessary but the color of light it emits is great for inducing flowers. You might adjust the feed as well. A concentrated but reasonable feed of phosphorus instead of N will generally cause a plant to flower no matter the circumstances. N deficiencies are to be expected far into flower but that plant is stretched and is not getting enough light. Keep trying. otherwise the plant is fairly healthy. <-----IMHO