25 Seeds Delphinium Bright Blue Hardy Perennial Tall Spikes Cottage Garden Border Cut Bouquets

Delphinium plants produce tall, stately spikes densely packed with vivid sky-blue flowers that bring dramatic vertical color to any garden. These hardy perennials are a beloved classic for cottage-style planting, adding an airy yet striking presence from summer into early fall.

These flowering perennials are grown primarily for their ornamental value in borders, beds, and cutting gardens, where the long stems make excellent fresh-cut additions to bouquets. Plants develop upright, branching growth with attractive lobed foliage, and established clumps will return year after year when given favorable conditions.

Species: Delphinium elatum
Type: Hardy perennial
Plant_Habit: Upright, tall flower spikes
Sun: Full sun
Soil: Rich, moist, well-drained soil
Zones: 3-7
Germination: Cold stratify seeds for 2-4 weeks before sowing for best results
Sowing: Surface sow on moist soil, press in lightly, do not cover (light needed); keep at cool temperatures 60-70°F
Spacing: Space plants 12-18 inches apart
Notes: Stake tall spikes in windy areas; deadhead spent blooms to encourage reblooming