Flavorah Rhubarb Concentrate
Vegetal, unsweetened rhubarb flavor. If you are looking for your mom's rhubarb crisp with 12 gallons of sugar, then you will need to mix this flavor with some other fruits and sweets, but standalone you will get a clear rhubarb with earthy and fibrous flavor notes.
This is concentrated flavoring and should be mixed with PG and/or VG before vaping.
The recommended percentage for DIY ranges from 2%.