Unusual clumping, Japanese species that we’ve grown for quite awhile now (having introduced both the variegated ‘Bikun’ and this solid green leaf cv to the U.S. more than a decade ago) and that we’re quite fond of. Nettle resembling foliage and spikes of blue flowers appearing just as the foliage emerges in spring. For those of you who may have grown the variegated form, this is far more vigorous and robust - easily twice the height and width. Easy in part shade to shade and well drained soil. To 12-15” x 12-15”. Z5? Quart pot.