Hannah looked up swiftly, but smiled at the sight of Neville beside her, and crumble too. "Of course you can sit," she said, as though it were silly for Neville to ever think that he might sometime be unwelcome. "Actually, you can probably help, too. I've been thinking about asking Professor Sprout if I could keep a little plot in our year's greenhouse, and I was trying to make a list of plants that would be good for us -" there was emphasis on the word, though Hannah's meaning was the DA, and not she and Neville exclusively, "to keep on hand. I thought about dittany, sweet clover, and lavender, but what do you think?"