First time box grow needs help

Hi Everyone

I need help! I just started the 12/12 cycle and I'm about 3 weeks in.

Today two of my plants are wilting very badly, the lower leaves are yellow and the ones that are still green on top are drooping down.

The two having trouble are in the same 3 quart pot. I just gave them a little water and put them closer to the light and changed the light cycle to 18/6. I was only doing 12/12 for 3 days.

Do I need to worry? What should I do?

Please Help save my babies! I'll post pics soon so you guys have a better idea.

Any help is much appreciated!

Here's the pics, got two plants in one pot and one plant on its own. I think in the future I'll just grow one plant per pot.

Ok.What strain?What nutes/medium are you using?You should separate the two plants definately,but it looks like they may have some under watering issues.Mine only droop when they get dry,which is good for me,b/c it tells me when to feed them.

I'm not sure what strain, it's bagseed. As for nutes I'm using Miracle grow liquid food 12-4-8, I know it's not the best but it's what I got. Soil is Scott's, the PH is balanced fine at a little under 7. I think your right about the underwatering, I let it go three days without water because the soil felt ok and I didn't think it would get too dry during the 12/12.

Also, they went from 24 light to 12/12, would that have stressed it out too much? How do you tell?

Update: After watering and moving the weak plants closer to the light they made a very fast recovery and look stronger than ever! Let this be a lesson, water is important.