@vn2202 then what was the point of creating a group out to destroy demigods?
Limitations: Some chemicals make him faint/light-headed, many animals don't like him and don't want to listen or see him, ability to control plants is somewhat uncontrollable, powers grow weaker/stronger proportional to amount of plant life around him (I assume the academy would have many plants around unless we're going for that woods around the academy thing. He's been living around a farm for his life anyway so I guess he would be unadapted to the different plant life of the academy.)