♤ Bud-bloomer, calyx lilac (H3);IX-XI; foliage mid-green; habit broad, bushy. Deliberately bred seedling; raised by K. Kramer in 1991 (sister-seedling of ‘Fritz Kircher’).
The name comprises the German words for three (drei), zero (null) and four (vier) (304 was its nursery code). Registered on 3 November 2002 by Kurt Kramer.
