slow growing, giant size (36 inches high by 48 inches wide) cultivar
was registered in 1980 by
Lucille Simpers of Indiana.
The foliage has 20 veins and is medium (forest) green in color
with no variegation. It has fertile, very pale lavender flowers from
July. H. 'Big
Boy' is an H. montana
The Hostapedia by Mark Zilis (2009), "It belongs to the group of
macrophylla look-alikes - all great, centerpiece plants
for the shade garden."
"Plant, as compared by Herz...shows this taxon similar to H.
montana f. macrophylla (formerly H. montana 'Praeflorens' or 'Krossa
B-3) but slightly larger. It may be a hybrid of one of these."