Here is my situation:

Closet setup, am using a HID florescent ballast for the growth phase then will switch to a HPS bulb for flowering.

I have been running the florescent setup 24/7 for a little more than a month now. Plants are beginning to reach a foot tall.

Started the seeds directly in standard "kegger" red cups which i cut holes in the bottom for drainage. I will be transplanting to a 6" pot once the plants start to show gender. (will also switch to HPS 12/12 at this point)

I have used no fertilizer in the plants as of yet, as this is my first grow and I want to make the situation as simple as possible before I learn to "tweak" mother nature.

Problem:

My middle and lower leafs are starting to curl together (imagine holding your hand out, palm up, and touching your pinkie to your thumb) and are starting to turn yellow and brown and now have become brittle and are breaking off when touched. Tops of the plants are a heathy looking dark green and are still growing well (other than some tip burning when I don't move the lights often enough or reset them to close to the plants) secondary leafs/shoots were fine at first, but now are beginning to brown at the tips.

Is this a nutrient deficiency? (Which one, whats a good product to use to fix)

Should I get larger pots and transplant now? If not when?

Anything else that is/could be causing this?
ddxsinxcosxdx Reviewed by ddxsinxcosxdx on . First time, having problems Here is my situation: Closet setup, am using a HID florescent ballast for the growth phase then will switch to a HPS bulb for flowering. I have been running the florescent setup 24/7 for a little more than a month now. Plants are beginning to reach a foot tall. Started the seeds directly in standard "kegger" red cups which i cut holes in the bottom for drainage. I will be transplanting to a 6" pot once the plants start to show gender. (will also switch to HPS 12/12 at this point) Rating: 5