Delphinium, Chinese Delphinium 'Summer Nights'

Delphiniumgrandiflorum

Family
Ranunculaceae (ra-nun-kew-LAY-see-ee)
Genus
Delphinium (del-FIN-ee-um)
Species
grandiflorum (gran-dih-FLOR-um)
Synonym
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Herbaceous
This plant is resistant to deer
Height
12-18 in. (30-45 cm)
Spacing
12-15 in. (30-38 cm)
Hardiness
USDA Zone 3a: to -39.9 °C (-40 °F)
USDA Zone 3b: to -37.2 °C (-35 °F)
USDA Zone 4a: to -34.4 °C (-30 °F)
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)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
Danger
All parts of plant are poisonous if ingested
Bloom Color
Medium Blue
Bloom Time
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
Patent Information
Propagation Methods
Seed Collecting
Regional

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

Des Plaines, Illinois

Downers Grove, Illinois

Machesney Park, Illinois

Rockford, Illinois

Sioux Center, Iowa

South Amana, Iowa

Lowell, Massachusetts

Saginaw, Michigan

Hopkins, Minnesota

Lima, Ohio

Norristown, Pennsylvania

Palmyra, Virginia

Vancouver, Washington

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Featured Videos

Gardener's Notes:

1
positive
1
neutral
1
negative
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B
B
Downers Grove, IL (Zone 5a) | June 2011 | negative

I saw this plant in 2008 at the local Home Depot and loved the color..it looked from a distance BLUE... I bought a bunch and the supply w...Read More

M
Hopkins, MN (Zone 4a) | November 2010 | positive

I happen to like the color blue, and it is difficult to find perennials that provide such a color. Summer Nights is a beautiful blue col...Read More

B
Lakemont, GA (Zone 8a) | March 2007 | neutral

Short 18"- Plant 18" apart. Zone 3-8 Excellent heat tolerance. Deep blue flowers. Hailing from China.

Blooms: Late Sprin...Read More

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