small flowers

Do Delphinium Attract Hummingbirds? Delphinium. Hummingbirds love delphinium, which blooms in early summer. Height for these perennials can average anywhere from 2 to 8 feet tall, depending on variety. Delphinium requires rich soil, and areas with relatively cool summers. Do bees and butterflies like delphiniums? The best plants for bees tend to be old-fashioned cottage