Mason,
First off are you growing in soil? The more you can tell us about your environment the better we can help you..... Also if you have pictures that would be awesome.
The first thing I am thinking of is that it could be burnt due to the temps or even nute burn if you have added nutes. Your plant could also be under-watered......
So tell us a little more about the whole grow and lets see if we can't help ya out.