Delphiniums are a tall, stately perennial that are an old-time favourite but are relatively short-lived. Most prefer cooler climates and well drained alkaline soils. Delphiniums are heavy feeders, and benefit from the addition of humus to the soil. Taller types have hollow stems and may require stalking to protect from wind and rain. Plant near the back of the border. An important aspect of caring for delphinium is deadheading the first blooms in early summer. Remove flower stalks when blooms are spent. When all blooms are removed, the gardener can expect a bountiful blast of blooms in late summer or early autumn.