Stella was eager to start the year off, and was perhaps most excited about Herbology. Sure, it hadn't been one of her best classes, but it was something she was passionate about (she blamed her E grade on the fact that she'd initially mistaken flitterbloom for devil's snare and shrieked). She took a moment to observe the plants on the windowsill, noting there were a couple more dangerous options — which was to be expected, they were NEWT students now — but she was definitely not going to be working with a venomous tentacula or a fanged geranium for that long, so instead, she chose the flutterby bush.

Perhaps she could make the flutterby dangerous. Maybe introduce a toxicity to he leaves to create an attractive barrier for one's garden. Not toxic to humans or domesticated pets, of course, but perhaps to gnomes...