This fragrant-leafed, deciduous shrub bears terminal clusters of tubular, violet-blue flowers from late summer to early autumn when most others have finished, and absolutely superb if trained as a standard.
These seeds have already been thoroughly cleaned and cold-stored for several months. They should be sown into well-drained, sandy compost at any time of the year, and covered to their own depth with sand or grit. No artificial heat is needed; the seed tray is best left in a cool spot outside and kept moist. Seeds germinate very slowly indeed in the spring after a chilling in the cold compost, regardless of when they are sown. Some seeds may take more than a year to germinate.
Common name:Bluebeard, Blue Spireae