- low maintenance, dense growing perennial
- height about 65 cm
- healthy dark green foliage, resistant to powdery mildew
- flowers evenly purple with a yellow centre
- flowers starts early and continues for a long season: late June – late September, peaking in July-August
- the lighter purple shade of Sirius® is new in A. ageratoides, adding a distinctly different colour to the range
- ideal for use in larger beds, embankments etc.
- easy to maintain, requiring an annual mowing in early spring
- Sirius® is the earliest flowering A. ageratoides in the range