This PDN introduction came to us around 1990 from former garden curator James Stevenson. Unlike most biennial sweet williams, our original clump is now over 15 years old. With so many folks asking about it, we finally got busy propagating and officially introduced it in 2001. Dianthus 'Heart Attack' starts flowering in early spring and continues for months with brilliant red-black, carnation-like flowers atop glossy, dark green, strap-like foliage. Unlike other biennial D. barbatus that we have grown, this one keeps returning and getting better each year. Pot size: 24 fl. oz (709.77 ml)
Zone: 4-8, at least 