Yea you cant edit questions once they are posted and when you reply to them. no one gets notifications of them even if you tag the person, I'll tag you
@shmalevich and you wont get a notification.
plants can be dwarfs. it could be the breeder you pick, or the strain. Its hard to tell with out seeing your entire setup.
the best you can do is try new things and ask questions.
Good Luck