Did you just get it recently? It looks a little rough around the edges but be patient. No more fertilizer for now, but water it as needed and keep it away from any drafts. How long is the grow light on per day?
I did get it about 10 days ago. The grow light was acquired yesterday, and is on for 9 hours a day on a timer.
It is on a windowsill with very cold temperatures outside, should I bring it further into the house like into my grow tent under the lights until it warms up a bit?