Caring For Delphinium Plants Over Winter – Watch Out For Wetness Rather Than Cold
perennial > DELPHINIUM > OVERWINTERING IN THIS GUIDE DELPHINIUM GUIDES DeadheadingGrowing From SeedGrowing In ContainersPropagating CuttingsSupportVarietiesWinter Care How you care for delphinium in winter very much depends on the type of delphinium that you have choose to spring up . Perennial delphiniums are typically H5 or H6 hardy , so they can make it through even extreme winters in UK gardens as long as they are growing in a free - draining spot ....