This quest becomes available after completing the Hungry Man errand at the Gohtzan Refugee Camp. You will receive a Spiky Seed as a reward for that errand, setting you up for this quest. Examine the Spiky Seed in your Valuables menu and you will see that this seed is favored by the Pipot in the refugee camp. As you receive different seeds, you will be able to check each seed in this same fashion to see where you need to go next.