uhm. just wait.
Terraria Community Forums
CantWontDo
Travlordian01⚡️
Yeah you have to wait a while then start exploring it takes time to grow
Techhunter_Talon
It's a plant, thus it's technically both male and female. 
That said, mine out a large chunk of the land around the bulb, or somewhere nearby. Planetera is a fight best done with plenty of space to maneuver around. Also, don't fight it before having at least Hallowed gear.
That said, mine out a large chunk of the land around the bulb, or somewhere nearby. Planetera is a fight best done with plenty of space to maneuver around. Also, don't fight it before having at least Hallowed gear.
CantWontDo
didn't cenx confirm plantera to be a girl?