This white edged sport of
H. sieboldiana 'Northern Halo' was registered by
Wade in 1999.
It forms a large size (24 inches high) mound and has thick substance to its leaves.
The near white flowers are borne from June into July. They have a
pale lavender stripe on the petals.
The Hostapedia by
(2009), "...'American Halo' was selected as an improved form
of H. sieboldiana 'Northern Halo', a much-maligned cultivar with
several divergent clones."
Similar cultivars include
H. sieboldiana 'Northern