One of the early side quests in Ni No Kuni 2 has you finding some Grass Green Thread. You get no help from a quest marker or from any NPCs and have to find it on your own. Check out this guide to find out where to find spools of Grass Green Thread in Ni No Kuni 2.
Where To Find Spools Of Grass Green Thread In Ni No Kuni 2
This one is actually a waiting game. Instead of searching for it all over the world you will want to hold this quest for a few more main missions. After you do three taskes for thel ady at the library you will recruit a Dog soldier for your army. He will give you two side quests and one of them is to recruit Min Ti. By giving her a Sleep-Be-Gone you will complete her quest and she will reward you with 5 Spools of Grass Green Thread. I read on some forums that you could find it in the Rolling Hills but I spent about a half hour there killing enemies and picking up shinnies and no dice. Even after I got them in my inventory it still says ??? on where to find them.
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