One of the best medium45sized perennials for biodiversity the hemp agrimony baby joe is highly attractive to butterflies from mid45summer through to autumn when it is covered in clusters of umbrella45like magenta45mauve flowers the domed colourful blooms and slender foliage are held firmly on attractive dark purple stems providing colour contrast which looks good all season 45 particularly through winter when the impressive seed heads of this compact form of eupatorium can be