A must for summer borders and ideal for cutting for sensational indoor flower arrangements! Cut each flower spike down when all blooms on it have finished this may promote a second flowering in late summerearly autumn. Summer Skies This variety will really make you feel like you're back on holiday with beautiful sky blue flower spikes that loom over the rest of the border. Looks fantastic to darker flowering varieties of delphinium, or even in front of blackdark green foliage shrubs for contrast. Flowers May July. Height 100 150cm 3'4 5' spread 60 70cm 24 28. HP Hardy perennial. Supplied in a 9cm pot.