For those who've had a prem baby, when did you start solids? Did you base it on actual age or corrected age?

We started DD1 at 4ish months (we were told by paed it might help with reflux). I asked DD2s paed if we should introduce them at 5 months (4 months corrected) and he is of the belief that the corrected age doesn't matter, if they'll accept them they're ready.

So, what did you do with your prem baby?