I love this plant. Echium vulgare, or Vipers bugloss blows in for free. It sets seed allover and I'm all the better for that.
I think it liked this dry spring. The flower spikes getting to four feet or more and oh, the truest blue.
I'm actually a little obsessed with blue. It ends up everywhere and in big quantities. Here (below) by the end gable I have Nepeta 'Six hills giant' - blue. Buddleja 'Lochinch' which will flower soon - blue. Perovskia 'Blue spire' - blue. And of course, Viper's bugloss - true blue.