Hardy Ageratum will attract butterflies and makes a lovely addition to any cottage garden or naturalized setting, as it is rarely eaten by animals due to its bitter taste. Also good for open woodland or rain gardens, it requires medium to wet soils, sandy or clay. Does fairly well in partial shade. Provide with a thin layer of compost mixed in, followed by about an inch of mulch. Divide every three years or so in early spring, or in autumn in zones 7 and warmer.