Yes exactly re the green and yellow essence. Come back and ask me anything anytime!
Forest essence comes from Ivy's Hut, Forest wisp, defeated Forest Wisps (spawn from white trillium). With similar names it can get confusing.
Hi, here's the info you need. This is from the Inventory Guide which I update (almost) daily with info and drops and where to find things. Without the gem pets that drop wisp essence (the yellow vials) you need to spawn wisps from cloudberry bushes or chop the big blue Grand Rooted Lillium. The fireflies might be back in the upcoming Black Friday sales and are an excellent source. They're not guaranteed to drop essence but do provide a steady trickle. Hope that helps
Wisp essence (0/99)
Info: Used to create Enchanted Lanterns for exploration and is earned from defeating wisps.
Found: defeating wisps (which spawn from Grand rooted lilium, Cloudberry bushes), wisp (pet), Firefly, Grand Firefly, Enchanted Fawnicorn, Fawnicorn, Wisp, Red Nose Fawnicorn
Uses: item in Enchanted Lantern craft released during Search for Sabina