Apply the remainder of your potion to the rest of your hair. Make sure to coat your entire scalp on through to your ends. However, the most important part is your scalp, as that is where the root is stimulated to grow. Once you think you're done, go at it for another few minutes!
Put your hair up and leave for 30 minutes. A bun, shower cap,pig tails or a ponytail will do, but since you'll probably be tempted to touch it, a shower cap is your best bet. You could also wrap it in a thin towel, too. Go do some yoga while you're watching TV, and come back when the episode is finished!