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PlantFiles: Tall Larkspur
Delphinium exaltatum

 
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Family: Ranunculaceae (ra-nun-kew-LAY-see-ee) (Info)
Genus: Delphinium (del-FIN-ee-um) (Info)
Species: exaltatum (eks-all-TAY-tum) (Info)

5 vendors have this plant for sale.

3 members have or want this plant for trade.

Category:
Perennials

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)

Sun Exposure:
Full Sun

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

Bloom Color:
Purple

Bloom Time:
Mid Summer
Late Summer/Early Fall

Foliage:
Herbaceous

Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater

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

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By bemidjigreen
Thumbnail #1 of Delphinium exaltatum by bemidjigreen

By bemidjigreen
Thumbnail #2 of Delphinium exaltatum by bemidjigreen

By Meredith79
Thumbnail #3 of Delphinium exaltatum by Meredith79

By kittysue
Thumbnail #4 of Delphinium exaltatum by kittysue

Profile:

2 positives
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorComment
Positive bemidjigreen On Jul 17, 2007, bemidjigreen from Blackduck, MN wrote:

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 fussy about soil--the bed its in has a lot of clay and this plant thrives.
The hardiness rating for this plant is not accurate--I live in zone 2b and its has overwintered two years here in the northeast corner of my house without any extra protection other than moderate snow cover. The flowers are small (1" each or less) but a lovely purple color. Even without blooms it is a very attractive plant--the foliage is much prettier than my pacific delphs. While not a show stopper its a very nice addition to a cottage garden.

Positive EdZ On Jul 3, 2006, EdZ from Gambrills, MD (Zone 7b) wrote:

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 has reseeded itself and I have about a dozen beautiful plants.
The only problem with them is they grow quite tall,4-5 feet tall. They require staking or they will blow over. I'm collecting the seeds again this year and hope to have a garden full of these plants.
I would recommend these flowers to everyone.

Regional...

This plant has been said to grow in the following regions:

Gambrills, Maryland
Blackduck, Minnesota
Hudson, New Hampshire
Fairborn, Ohio
Lexington, Virginia



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