Penstemon Plant - Electric Blue Create amazing flower displays with these electric blue beauties. The Penstemon Plant - Electric Blue is a truly magnificent plant producing fantastic intense electric blue flowers that will illuminate your flower beds and flower borders. Similar to foxgloves, the Penstemon Plant - Electric Blue produces long flute shaped flowers on tall spicates of rich green foliage, creating not only a diverse colour palette for your garden but different textures too. The Penstemon Plant - Electric Blue creates long lasting blooms from June- September meaning you can enjoy these beautiful flowers all summer long. Plant these amazing flowers in an ornamental patio pot or container to really brighten up your patio flower displays. The Penstemon Plant - Electric Blue grows to a height of 45cm (18").