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Delphinium 'Diamond Blue' – Upright High-Impact Blue Spikes

Delphinium 'Diamond Blue'

For high-impact vertical color, 'Diamond Blue' delivers intense blue flowers held upright on tall, strong spikes. A striking presence in the sunny border that draws the eye upward.

Full sun, under 2 feet tall, spreading 1 foot or less. Excellent for adding architectural height to perennial plantings.

Quick Facts

Light: Full Sun
Height: 2 feet or less
Spread: 1 foot or less

About Garden: Ageratum 'Fields Blue': Reliable Blue Blooms for Edging and Containers; Aster 'Pot N Patio Blue': Dwarf Double Blooms for Containers; Lisianthus 'Lisa Blue' – Dwarf Blue for Low Light and High Heat; Lobelia 'Regatta Midnight Blue' – Trailing Midnight Blue for Baskets; Lobelia 'Riviera Blue Eyes' – Compact Blue‑Eyed for Beds and Combos; Lobelia 'Waterfall Blue' – Cascading Blue for Baskets and Walls; Petunia 'Daddy Blue': Ruffled Blue Blooms for Summer; Delphinium 'Blue Butterfly' – Compact Blue Spikes for Full Sun; Elijah Blue Fescue – Icy Blue Ornamental Grass; Platycodon 'Astra Blue' – Compact Balloon Flower

Garden Articles

Lobelia 'Riviera Blue Splash' – Compact Blue‑Splashed for Color Splashes

Lobelia 'Riviera Midnight Blue' – Compact Midnight Blue for Deep Color

Lobelia 'Riviera Sky Blue' – Compact Sky Blue for Airy Splashes

Pansy 'Matrix Blue Blotch': Classic Blue with Dark Face

Pansy 'Matrix Blue Frost': Unique Frosted Blue Blooms

Petunia 'Dreams Sky Blue': Clear Blue for Summer

Phlox '21st Century Blue': Classic Cool-Season Blue

Plants

Pansy 'Matrix Deep Blue Blotch': Intense Deep Blue with Dark Face

Vinca 'Titan Lavender Blue': Rare Blue-Lavender Giant Blooms

Viola 'Sorbet Blue Heaven': Ethereal Sky Blue for Cool Seasons

Elijah Blue Fescue – Icy Blue Ornamental Grass

Aquilegia 'Origami Blue & White': Large-Flowered Columbine

Crater Lake Blue Speedwell – Intense Blue Stars for Rock Gardens & Walls

Nemesia 'Aromatica Deep Blue' – Fragrant Deep Blue Flowers