The butterbur blooms in the spring and grows lush foliage in the summer months. The plant thrives in U.S. Department of Agriculture Plant Hardiness Zone 4 to 9. On average, the plant grows up to 3 feet wide and 9 feet tall.

Is butterbur invasive?

White butterbur is an invasive non-native species that is particularly prevalent across the North East of Scotland and causes serious environmental impacts along riparian corridors.

How does butterbur spread?

It emerges in late winter or early spring, sometimes with clumps of white or pale yellow flowers appearing before the leaves, and can grow up to six feet tall. Japanese butterbur spreads mostly through underground stems, and sometimes through seeds.