Fertilizing? Mo leaned waaaaaaay over and peered under his bottom frame, where the ivy was potted and tucked out of sight. It was a good thought, but could he even get anything in there? Suppose he'd have to try, which was probably good practice since Mo would have to figure out how to water his topiary at some point too.

It was hard work to once again rise to his feet and hobble over to get the regular fertilizer, and even harder to lug back enough to make it worth the effort, and Mo was panting by the time he made it back to his topiary. Whew. He was so over this being old thing.

The bottom frame was easy enough to shift upwards on the post, and so Mo was able to loosely pack fertilizer around the potted ivy. He watered again for good measure. "Aguamenti." If he was feeling more clever, he would have used the special fertilizer and made the wings on his Snitch flap, but Mo was quite pleased with his stationary, non-magical topiary.