Hammock Snakeroot also known as Ageratina, Ageratina jucunda, is a deciduous perennial wildflower that grows 1'-3' tall and 1'-2' wide. It blooms with clusters of white flowers in Fall-Winter and is a great attractor and nectar source for pollinators and hummingbirds. It prefers full sun to part shade and moist soils, but can tolerate periods of drought once established.