I grew a banana plant from seed I bought at a store about 6 months ago. I don't know exactly what species it is but it has been a thrill watching grow up.

I made the mistake a few months back to fertilize it with miracle-gro plant food spikes. Once I realized my mistake I repotted it. It is now in a 10" or 12" pot and the leaves are about 1-2 feet long and 5-9" wide. It's growing slowly now due to winter season.

I have noticed whenever new leaves come out they are very green and then a few days later I notice yellow patches growing in the center of the leaf. They go from small zones to larger ones, The colors vary from green -> yellow -> yellowish-red -> brown. It is growing new foliage so I am assuming that it is still somewhat healthy. I am just concerned about the overall health. I let water stand out for two days to let the chlorine and fluorine to escape before watering. I will post pictures of it later when I get home from work.

Any ideas/suggestions would be tremendously appreciated.

I've noticed this, too, when I bring my banana tree in for the winter. The older leaves all start to brown and drop off, while the new ones grow a lot more slowly. For me, this process usually slows a great deal as the browning reaches the top layers of the plant. I think it's just the plant realizing it doesn't have the required energy to support so much foliage...at any rate, it's nothing to worry about. Just be really careful about over-watering it. I usually go so far as to let my banana begin to wilt before giving it another drink. Go light on the fertilizer, and if necessary, consider bringing in a touch of artificial lighting.

Good luck!