Swap wedding bells for a quieter but undeniably prettier variety by planting penstemon 39pensham wedding day39 this hardy perennial39s white bell45shaped flowers grow on elegant upright spikes that rise above its semi45evergreen foliage from june to october what39s more the plant is considerably less upset by rain than the average beautiful bride in fact it can tolerate most weathers as pensham penstemons are bred to survive in cooler climates height 75cm 402396