This subspecies from the Himalayas differs from the species in its shorter flower spikes, slightly deeper color, and less stringent deman...Read Mored for consistent moisture.
Most important, it is a clump-former and does not run, unlike the species.
Said to rebloom in September. Beth Chatto says it is always in bloom for her.
Tolerates boggy soils. Does not perform well in hot humid summer climates, like that of the southeastern US.
This subspecies from the Himalayas differs from the species in its shorter flower spikes, slightly deeper color, and less stringent deman...Read More