Genshin Impact : Violetgrass

To find Violetgrass, you must explore the region of Liyue, as this is a Liyue Local Specialty. Violetgrass can be located all over the region, though it appears in vast numbers around Mingyun Village, Wuwang Hill, and in between Lingju Pass and Dunyu Ruins. Violetgrass can also be purchased at Bubu Pharmacy in Liyue Harbor by speaking to the NPC Herbalist Gui. This shop has five in stock selling for 1000 Mora apiece, and its stocks refresh every three days. Bubu Pharmacy's location can be seen below.

You can also buy Violetgrass from the boss of the Wangshu Inn, Verr Goldet. It's possible to buy five Violetgrass at 1000 Mora apiece, and the stocks refresh every two days. Verr Goldet's location can be seen below. An NPC called Mengmeng, who is found running about south of the Statue of the Seven at Bishui Plain, upon following a specific dialogue branch, will give you five Violetgrass. Choose the responses below:

1. What are you doing?
2. It might be bad to pick new flowers.

Local Specialties respawn every two days after looting them; however, this is based on the time you harvested them, not the server reset time. The two images below show where you can find Violetgrass in Liyue. Click on the images to enlarge.

Thanks to Map Genie Genshin Impact Interactive Map!