I personally don't grow crops that give Fruit of Magic Power/Perfection, so it might not be accurate:
- Fruit of Magic Power > (Fortune Teller Mushroom/Emperor Mushroom/Hump Mushroom/Tiger Mushroom)
- Fruit of Perfection > (Fog Mushroom/Cloud Mushroom/Arrow Mushroom/Bluffer Mushroom)
- Fruit of the Sun from Wheat/Tomato (+ Corn/Paprika)

I suppose manual gather also works for this quest

Edit: Fruit from manual gather does count towards quest completion, at time of writing (Oct 19, 2016)
Got lucky on 1 gather, 2/3 done

As someone said on the previous quest, if you "improve" a crop made with Mysterious Seed then you will get it automatically. So you can have a Mysterious Emperor, Arrow, and Wheat ready to go when you accept the quest and finish it instantly.

Concluido com sucesso coletei todas as Frutas em cogumelos Proximo a florin. Data 16/05/2023

Just gather, ALL 3 fruits can drop from Amanita Mushroom around Khuroto Cave. Took me less than 5 mins to get all three, Profession 9 gathering, 350 mastery.