Blue Mirror Delphinium

Delphinium grandiflorum 'Blue Mirror'

Tall spires of brilliant violet-blue flowers rise above a tuft of large, deeply cut foliage. Its slightly shorter stature reduces the need for staking. An essential of the perennial border and of cottage gardens. A reliable bloomer for areas with short growing seasons. Bloom often continues through late summer into fall. An herbaceous perennial.
There are very few rules in gardening, but perhaps the most important one is to work within your zone. Choosing plants that grow and thrive in your particular climate is the very first step toward having a beautiful garden . Learn More

Your climate might be too cold for this plant:


Full sun, Partial sun

Water regularly - weekly, or more often in extreme heat or containers.


Due to the seasonal nature of plants, availability at your local garden center is not guaranteed. Give them a call before visiting.

Find more stores near me >
Set Zip to See Prices
More Information
Botanical Pronunciationdel-FIN-ee-um gran-dih-FLOR-um
Average Size at MaturityFoliage reaches 12 to 18 in. tall, 18 in wide, with blooms to 24 in. tall.
Bloom TimeLate Spring through Summer
Design IdeasDelphinium is an essential of all perennial borders as well as mixed beds. Plant into foundation compositions to add highbrow beauty. Mass to create a stunning focal point or to bring out distant garden art. Add into cottage gardens to provide strong blue shades and gang along white picket fences for charm. May be inserted just about anywhere the soil is rich enough to provide elegance and color in the late spring.
Deciduous/ EvergreenHerbaceous
Flower AttributeFlowers for Cutting, Showy Flowers
Flower ColorBlue
Foliage ColorGreen
Garden StyleCottage, Rustic
Growth HabitErect
Growth RateModerate
Landscape UseBorder, Container, Mass Planting, Woodland Garden, Cutting Garden
Light NeedsFull sun, Partial sun
Soil NeedsFlower & Rose Food
Special FeatureEasy Care, Extreme Cold Hardiness, Tolerates Alkaline Soil
Water NeedsModerate
Watering NeedsWater regularly - weekly, or more often in extreme heat or containers.
Companion PlantsBlanket Flower (Gaillardia); Black-Eyed Susan (Rudbeckia); Coneflower (Echinacea); Phlox (Phlox); Shasta Daisy (Chrysanthemum)

Thrives in enriched, neutral to alkaline soils; amend soil with lime if needed. Water deeply and regularly during the first growing season to establish an extensive root system. Feed with an all-purpose fertilizer in spring; repeat after first bloom flush. Prune spent blooms to prolong flowering. Cut back to the ground at the end of the season.

This Plant's Growing Zones: 3-7

Your USDA Cold Hardiness Zone:

Your climate may be too cold for this plant