Head to the Herbology classroom and walk into the room that has a table with four flower pots on it. You should see a bucket hanging on the ceiling above the dancing water can. Cast Wingardium Leviosa on the bucket and let it hover over every pot so that it pours dirt in each one. Now cast Wingardium Leviosa on the water can and hover it over each dirt-filled pot to pour water on them. You should then see Spikey plants grow and you’ll receive Discovery Points. Then go to the entrance to the Herbology room and walk forward into the dead-end hallway right in front of the door inside the classroom. Use Accio on the rope hanging in the corner to receive more Discovery Points.