Another of the many sports of H. 'August Moon', this is a non-registered cultivar from
Alex Summers of Delaware. Its leaves are dark green with a gold margin
variegation. The medium to large size plant produces lavender
flowers in July and into August.
The Hostapedia by Mark Zilis (2009), "More than one plant has borne the name 'Dark Moon', but
Alex Summers' plant was the first known to collectors."