When can a baby drink natural orange juice?

9 mo, but not needed. I would say about nine months, but in moderation. Juice--even natural juice--has a lot of sugar, and isn't as nutritious as all the hype suggests. Better than 'juice drinks', yes, but not that much better. I often suggest diluting it. But, juice is not necessary for your child. It has vitamin c, yes, but that is easily obtained from many other sources.