Defeat Deep Wood Tatars and Fog Wood Tatars around Tapaeon to collect Tatar's Seeds. Then, talk to Giregg at Tapaeon. Use your quest tracker to see your progress.
Giregg: How could one dare to creep onto the sacred Tree of Giregg: Favor?! NakanoAzusa: Pardon? I thought you needed me to- Giregg: I didn't say you! I'm talking about tatars! HiiragiKagami: Tatars? Giregg: It's that weird plant that grows from the ground! HiiragiKagami: Oh. They look tasty! Giregg: Those monster flowers are approaching the Tree of Giregg: Favor. They reproduce very fast and it won't be long Giregg: until they arrive here. NakanoAzusa: We need to stop that from happening. Giregg: Of course. This tree is a sacred tree of Kynari! We Giregg: can't let a monster like that come close! Although Giregg: they spread fast, the female tatars only have one Giregg: seed for each. If we can take the seed away, they Giregg: won't be able to spread as fast. NakanoAzusa: Couldn't we just kill them? Giregg: They come back like weeds. Even if we kill them, Giregg: there will be no end to them.
Reminder Dialog
Giregg: Those dirty plants! We must demolish them!