K.
Any time after 6 months you can stop using the "baby" cereal. The baby versions have amylase, an enzyme that helps break up the starch. After your baby is 6 months they make their own so no need to buy it except for convenience. We started feeding our son oatmeal (rolled oats), rice, etc (sometimes put through the food mill to help with consistancy) at around that age. I like the "real" grains better because they don't start to digest themselves if you let them sit too long - you can make a big pot and stick it in the fridge and feed some to your girl every day - it will keep for about 5 days.