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

Category
Perennials

Water Requirements
Average Water Needs; Water regularly; do not overwater

Sun Exposure
Full Sun
Sun to Partial Shade

Foliage
Herbaceous

Foliage Color

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)

Where to Grow

Danger
Seed is poisonous if ingested
All parts of plant are poisonous if ingested

Bloom Color
Medium Purple

Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds

Bloom Size

Bloom Time
Mid Summer
Late Summer/Early Fall

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