Description from High Country Gardens
24″ x 18″ wide, (cutting propagated). ‘Caradonna’ is a distinctive, award winning cultivar developed at Zillmer Nursery in Germany. Unique with its tall, very dark purple flower stems and stunning blue-violet flowers, ‘Caradonna’ blooms for many weeks beginning in late spring. The nemorosa type sages thrive in a wide range of soils (including clay), and provide a strong vertical element with their uniformly upright flower spikes. They thrive with minimal care. Zones 4-8. 5″ deep Premium pot.