Wilting caused by lack of watering. This post is being filled out 3/12 just because I've been so busy. I really neglected to water and watch out for my plants this week. Heavy defoliation right after the previous weeks pics were taken, they can still bounce back. Possibly showing signs of iron deficiencies again.
@capricious from the way they are yellowing I would say its lacking in iron which can be corrected by spraying with chelated iron
I would reccomend a regular feeding of Calmag as well mate
You are in a early stage of your grow, and its no big damage, It may took not so nice, but its way better than having an excess. Plants come back just continue feeding . Ian around 3 weeks she should look great again