Blue-violet flowers on upright stems in June-July.
Stems are given to flopping, and should be cut back after flowering if ...Read Morethey're untidy.
Best with afternoon shade in warm-summer climates.
Authorities differ on whether this is a G. ibericum or G. x magnificum (G. ibericum x G. platypetalum). It's claimed to be sterile, but will not rebloom even if deadheaded.
Blue-violet flowers on upright stems in June-July.
Stems are given to flopping, and should be cut back after flowering if ...Read More