Inner Forest Park, give the Fairy Queen cheese, where? Statue deep in the Forest, located near the Abandoned Town, how? Beat fairies, normally not Lewdly, then collect their Dust, using a bottle, sprinkle the Dust, upon the statue, and then gift the queen "Milk" cheap gift and they love it, play a game with the Queen, after the game speak to her again, ask about the Plant, give her "Cheese" refined from New-Ark, or Milk Farm, up to you, chase the Tribal in the Inner Forest, pink area pick up Mushrooms, now all you need to do is wait....
After a while you will get symptoms, waiting longer will make them grow.