Petasites japonicus subsp. gigantea
Japanese Butterbur | This is a big, bold and proud grower! 3'-tall mounds of bold foliage are produced after small, green spring flowers. Happiest in light shade with its feet in water or consistently damp soil. But if given lots of moisture it is an aggressive spreader. On medium moisture soils it is less aggressive. If you have some space to let this one roam, it s quite stunning.