Sophie tried to follow along. Really, she had. The professor lost her at the fifth or so word, though. She got that they were trying to distinguish between two growth charms. What she got lost at, though, was where you point your wand and what the target is and all that jazz.

She blinked and slowly raised her hand. "Maybe one charm is designed for household plants that won't grow but just a few feet tall," she said, "and the other is designed for really large trees that typically go outside." Why else would there be two growth charms? She guessed they'd find out just why soon enough.