Fleurir belong to the 2
nd group. Fleurir is a common french verb.
Fleurir is conjugated the same way that verbs that end in :
-ir
Fleurir is conjugated with
auxiliary avoir.
Fleurir verb is
direct transitive, intransitive.
French verb fleurir can be conjugated in the reflexive form:
Se fleurir
Fleurir verb is a direct transitive verb, so passive voice can be used.