Spike wandered back to where Professor Bentley stood, his now slightly crumpled parchment in hand. Maybe he should have used something to rest against for writing? Ah well, luckily Herbology wasn't marked on how neat his handwriting was, nor how muddy his hand prints were.

"Re-potting, if necessary," Spike answered. "People often keep herbs in small pots in the kitchen, but this can be really restricting as the roots grow, and can lead to a deficiency in nutrients. Re-planting in bigger pots, and possibly thinning plants whilst doing so, helps ensure that the plant has room to grow and flourish."