Echium vulgare on biosolar roof, Essex, London. Installed and planted by P&P. Photo by A. Favell, P&P.
Echium vulgare has violet-blue trumpet flowers, produced on erect spotty (viper-like) stems May to Sept. The deep-tubed nectar-rich flowers are popular with longer tongued bees, butterflies and moths.
Guide: biosolar-roofs.com/plants-for-b...
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