White Snakeroot

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White Snakeroot Ageratina altissima Part sun to light shade; medium moisture level but will tolerate somewhat drier soil; prefers rich humus but will accept a wide range of soils including clay; slightly acid to neutral pH.  2-5 ft. height, blooms in fall, white flowers, spreads slowly by rhizomes and more aggressively by re-seeding. Germination Code:  A, D Native Region:  Statewide Showy clusters of white flowers in September and October.  Does best with a few hours of sun.  Will spread to form colonies. flower;sun/shade;medium;clay flower;sun/shade;medium;loam flower;sun/shade;medium;sand flower;sun/shade;dry;clay flower;sun/shade;dry;loam flower;sun/shade;dry;sand flower;shade;medium;clay flower;shade;medium;loam flower;shade;medium;sand flower;shade;dry;clay flower;shade;dry;loam flower;shade;dry;sand