Fairy Seedling Won't Plant

I was having the same problem and then I clicked on the ground. You don't drag the seed or click the "plant" option. You click where you want to plant it and then there's a new option to "plant fairy seedling." It's its own thing.  

I also just thought this was a seed for an actual plant.  But it's how you summon mother nature to become a fairy. I have no idea where I got it as I didn't do a quest to become a fairy and don't plan to be one. Luckily you can just cancel out.