Great chapter, I most agree with Cateagle, loved the way the class room settings were handled. Are you going to explain why Harry was able to command the plant, other than just he's powerful; like he literally has a green thumb or something. Can't wait to see what other surprises are in store for Harry and his first class encounter with Snape.
Author's response
The incident with the plant was solved due to his special ability that I may come straight out and say later on, for now it is my little secret. However, Harry can't command plants, he can talk like a magical plant. It was more the forceful tone he was using and the fact that he is good with magical plants.