this plant has gone very yellow although it is still fruiting. it is not producing the same amount of fruit as the rest or as green. it is also not producing any new shoots.

The pumpkin-like look of the berries is typical of mummy berry.

There a lot on web about mummy berry.

Here is a link that might be useful: Mummy berry

I planted a bunch of blueberries about a month ago, 7 plants actually, and they have leafed out, but really havent grown much. Im a little disappointed. I have them in a soilless mix in containers.

TheDerek,
Are they being fertilized?Possibly try giving them a tablespoon of Ammonium Sulfate mixed in about 2 1/2 gallons of water,once per week.
Sometimes it also takes awhile for the roots to develop. Brady