(aka: Ageratina havanensis) Don't bother to look this one up, as few books seem to recognize its existence. From deep in the heart of Texas, where drought tolerance and rocky alkaline soils are a way of life, comes a superb eupatorium that produces a mass of foliage 2' tall x 4' wide on very woody stems. In mid- to late October, the clump bursts into flower to the point of being covered with a mist of white. The flowers of Eupatorium havanense persist until temperatures drop well into the teens. We have grown this for over a decade and feel this is a must-grow plant for gardeners in the South!