https://www.rhs.org.uk/plants/386765/glandora-diffusa-(lag-)-d-c-thomas-purple-gromwell-gentian-gromwell/details
Find help & information on Glandora diffusa (Lag.) D.C. Thomas purple gromwell Shrubs from the RHS
glandora diffusapurple gromwelllagcthomas
https://pfaf.org/User/Plant.aspx?LatinName=Lithospermum+multiflorum
Lithospermum multiflorum is a PERENNIAL growing to 0.5 m (1ft 8in). See above for USDA hardiness. It is hardy to UK zone 3. It is in flower from July to...
plant databaselithospermummultiflorumgromwellstoneseed