New Grow Suggestions

Ok, so I'm new to growing. Actually.... I'm fairly new to smoking. When I get into something I tend to jump in. I'm a college student and I'm growing fairly under the radar. Basically, I have a footlocker with grow lights in it. You can't tell its more than a foot locker at all. Its in a corner of the room on a shelf with the power chord out the back to a hidden power timer. So far its been running smoothly for about a month. I have a 7 inch plant a several smaller ones that I started about 10 days ago. The 7 inch plant hasn't shown any signs of sex yet as far as I can tell, but the leaves are really starting to pile out on the top. I've got a couple leaves with brown tips, but i think its because they're drooping a little. I'm growing in soil and using miracle grow at 1/4 strength about once a week. The timer is set for 8 hours of night 16 of light. I have no clue what the plant species is, I've got a bag of seeds from an ounce worth of mid regs I bought about 4 months ago. Basically, I just want to know if there's anything that you can gleen from what I've already said that I should be doing extra or not doing.

Thanks

you're not living at school are you? How old is your plant? Sounds like a nute deficiency