Wild roses are supposed to keep vampires away. Placing the branch of a wild rose inside a vampire's coffin will keep him from rising. And fashioning a cross from the thorns of a wild rose plant is also an effective deterrent against the fanged ones.
The wild roses mentioned in Dracula may have been the hawthorne shrub. Just imagine them planted about the vampire's grave. They rise at night and become entangled in the wicked thorns.
Or so we can hope. (At least that it keeps back the bad vamps; we'll take the broody, romantic ones.)