Usually a volcano39s explosion would cause those nearby to flee however when penstemon 39vesuvius39 erupts into bloom in june bees butterflies and gardeners alike are sure to flock towards its stunning flower spikes the plant39s dark purple petals continue to flourish throughout the summer and well into the autumn making this hardy perennial a colourful addition to both cottage and wildlife gardens height 60cm 4023903441 spread 30cm 4013903441