After @AlainK said yesterday that ghosts are difficult to obtain where he is, I thought I would suggest these two as good alternatives. I have both in my garden and they look nice in the morning sunshine. They are Reticulatum and Reticulatum Purple. Both set each other off with their contrasting colours. I also find that Reticulatum stands out against the dark green of my Laurel hedge. @zfrittz might find these easier to find in Spain rather than the ghosts.