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Delphinium exaltatum (Tall larkspur)
Species Distribution Map: Click to enlarge
Map Color Key © 2013 BONAP

Delphinium exaltatum

Tall larkspur

Wow! A blue-flowered Delphinium for bright to average shade and it is native to woodland glades from Alabama to Pennsylvania. Ours came to us thanks to the generosity of the Holden Arboretum in Kirtland, Ohio. Spikes of spurred blue flowers top 3-6' stems from July to September. A welcome addition to the woodland edge or bright shade border.

SIZE
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Height

3-6 Feet

Spacing

12 Inches

Bloom Color

Blue

USDA Hardiness Zone 5-8

Tall larkspur Interesting Notes

Delphinium exaltatum is an attractive and floriferous native woodland-edge perennial that is equally at home in the home garden border. Growing to a height of 4’, this summer-blooming perennial has attractive medium-green, palmate leaves and narrow stalks of showy, deep blue-purple flowers that attract hummingbirds and butterflies. Tall larkspur excels in moisture-retentive, well-drained, humus-rich, slightly alkaline soil and prefers filtered shade to full sun. Delphinium exaltatum is an attractive addition to the garden when planted en masse with Coreopsis tripterisSolidago rugosa‘Fireworks’, Vernonia angustifoliaSilphium simpsonii, and Veronicastrum virginicum. - Mt. Cuba Center

Tall larkspur has grayish green leaves divided into 5 lobes that are in turn divided into 3 teeth at their tips. It is a large and vigorous plant. It blooms fairly late, so the foliage remains in good condition most of the summer. - William Cullina, Growing and Propagating Wildflowers

exaltatum = very tall - Dictionary of Botanical Epithets

Delphinium exaltatum Growing and Maintenance Tips

Grow in partial to full shade in rich soil with high organic content. Seeds in freely when happy. Prefers average to rich soils with good drainage and is quite drought tolerant once established. Not one for clay!

Key Characteristics & Attributes

Deer Resistant
Deer Resistant
Butterflies
Butterflies
Hummingbirds
Hummingbirds
Full Shade
Full Shade
Part Sun
Part Sun
Summer
Summer
Moist
Moist
Average
Average
Drought Tolerant
Drought Tolerant
Cut Flower
Cut Flower

Additional Information

Propagation Type
Open pollinated
Attributes
Native to North America
Moist Shade