Delphinium Species, Tall Larkspur

Delphiniumexaltatum

Family
Ranunculaceae (ra-nun-kew-LAY-see-ee)
Genus
Delphinium (del-FIN-ee-um)
Species
exaltatum (eks-all-TAY-tum)
Synonym
Delphinium tridactylum
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Herbaceous
Height
36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)
Spacing
12-15 in. (30-38 cm)
15-18 in. (38-45 cm)
Hardiness
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
Danger
Seed is poisonous if ingested
All parts of plant are poisonous if ingested
Bloom Color
Medium Purple
Bloom Time
Mid Summer
Late Summer/Early Fall
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Non-patented
Propagation Methods
By dividing the rootball
From herbaceous stem cuttings
From seed; direct sow outdoors in fall
From seed; sow indoors before last frost
From seed; direct sow after last frost
Seed Collecting
Bag seedheads to capture ripening seed
Allow pods to dry on plant; break open to collect seeds
Regional

This plant is said to grow outdoors in the following regions:

East Haddam, Connecticut

Valparaiso, Indiana

Gambrills, Maryland

Blackduck, Minnesota

Hudson, New Hampshire

Fairborn, Ohio

Enid, Oklahoma

Leesburg, Virginia

Lexington, Virginia

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Featured Videos

Gardener's Notes:

3
positives
0
neutral
0
negative
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P
Valparaiso, IN | May 2013 | positive

Tall Blue Larkspur thrives in shade too! Give it rich well-drained soil in light to medium shade and it will reward you with many years o...Read More

B
Blackduck, MN | July 2007 | positive

As previously stated this is a very tall plant. Its in its second year in my garden is over 4 feet tall. It doesn't seem to be too fus...Read More

E
E
EdZ
Gambrills, MD (Zone 7b) | July 2006 | positive

2005 was my first experience with larkspur. I didn't plant it so I figure a bird deposited a few seeds in my garden.
This year it ...Read More

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