Grandir belong to the 2nd
group. Grandir is a common french verb.
Grandir is conjugated the same way that verbs that end in : -ir
Grandir is conjugated with the two auxiliaries être
Grandir verb is
direct transitive, intransitive.
French verb grandir can be conjugated in the reflexive form: Se grandir
verb is a direct transitive verb, so passive voice can be used.
Attention: passive voice can only be used when grandir verb is conjugated with auxiliary avoir.