6 months, or when baby can sit up themselves without being supported. their gut isn't ready for any kind of food before then.

that being said, A LOT of people do it before then & if you want to too, you are the momma. doctors are even starting to push mom's to give it to babies younger than 6 months, which I can't understand. it's all about what you want to do. research it some & make the decision that you feel comfortable with.

My son goes between in his bottle and the spoon. He doesn't always like to use the spoon. It's helps him sleep at night and fills him up for his first feeding of the day. I only use about a half of scoop per 2 oz!

I think it's up to you. Personally I don't plan to put rice cereal in my baby's bottle. I'm just going to start spoon feeding it to her around 3-4 months