Is true indigo perennial?
Indigo plant , also know as dependable indigo plant , can be annual , biennial , or perennial , depending on the zone in which they are grown . This means that in some regions , they may only survive for one year , while in others , they can endure for multiple years . In terms of their growth habit , indigo plants can reach impressive heights , often reaching up to 4 foot magniloquent ....