Commentary Par XXVI 91-92

Adam was, by tradition, thought to have been created by God as though he were thirty or (more usually) thirty-three years old (thus matching the years of Christ on earth).  Tommaseo (DDP Tommaseo.Par.XXVI.91-93) remarks that the protagonist's phrasing is not very kind, since it brings to Adam's mind the appetite (for the apple) that caused his fall.

On this passage see Moevs (Moev.2005.1), pp. 101-2, distinguishing between Adam as indeed ripe in himself, as he was made by God (and now again is), and the creature he had mistakenly thought he could improve by opposing God's will and stealing His forbidden fruit.