The first thing you have to do is venture into the deserted places of Sumeru, where only cacti-like trees grow and can be identified by the color of Lush Crimson. Now only used to upgrade Candace, a 4-star hydro character who wields a polearm.
To find it you will have to search in the following locations:
South of Dar al Shifa
Around the town of Aaru
East of the Dune of Carouses
Although the fruit can be found in almost all the deserts of Sumeru, scattered all over the map. It will be necessary to find 168 fruits to promote Candace to level 90.
This is everything you need to know about where to find Redcrest in Genshin Impact, so good luck and we hope you can find this material very quickly.