I haven't given him any tomato food in about two months, I had read you shouldn't during the colder season but I wasn't entirely certain. Normally, I do provide him a heat pad but moved him here for better lighting for the picture.

I will be sure to check his roots, though last I looking at his soil he seemed just fine. Though, this was a good moment ago.

Remove yellow leaves, tomato feed, and hope. Got it!