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Family: Polemoniaceae (po-le-moH-nee-AY-see-ay) (Info) Genus: Polemonium (po-le-MOH-nee-um) (Info) Species: caeruleum (see-ROO-lee-um) (Info)
2 vendors have this plant for sale.
8 members have or want this plant for trade.
Category: Perennials
Height: 12-18 in. (30-45 cm) 18-24 in. (45-60 cm) 24-36 in. (60-90 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 4b: to -31.6 °C (-25 °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)
Sun Exposure: Light Shade Partial to Full Shade Full Shade
Danger: N/A
Bloom Color: Medium Blue Purple White/Near White
Bloom Time: Mid Summer
Foliage: Herbaceous
Other details: Requires consistently moist soil; do not let dry out between waterings
Soil pH requirements: Unknown - Tell us
Propagation Methods: By dividing the rootball From seed; sow indoors before last frost From seed; direct sow after last frost
Seed Collecting: Bag seedheads to capture ripening seed Wear gloves to protect hands when handling seeds Properly cleaned, seed can be successfully stored
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| By meplant
 By jody
 By poppysue
 By Weezingreens
 By carolann
 By KimGaither
 By zsnp
 There are a total of 13 photos. Click here to view them all! |
Profile:6 positives 3 neutrals 4 negatives
Gardeners' Notes:
| Rating |
Author |
Comment |
| Neutral |
Crimson |
On Oct 27, 2001, Crimson from Clarksville, TN (Zone 6b) wrote:Grows wild in England. It is a woodland plant for the shaded garden or for naturalizing in moist, leafy soil.
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| Neutral |
Lilith |
On May 4, 2002, Lilith from Durham
(United Kingdom) (Zone 8a) wrote:A handsome plant with long heads of hazy-blue showy flowers and finely divided foliage. When ripe, each anther bursts, releasing a mass of bright orange pollen, contrasting vividly with the blue of the petals. Creeping underground stems propagate the plant so that, given time, it forms extensive clumps. The common name derives from the ladder-like pattern made by the numerous parallel, narrow leaflets. A distant relative of the garden Phlox, Jacob's-ladder is widely cultivated for ornament, although many plants are the rarer white form, or an introduced variant with larger flowers. Until the Nineteenth Century in some parts of Europe, the species was thought to be effective in the treatment of syphilis and rabies. It was used in more ancient times against dysentry and toothache. |
| Positive |
smiln32 |
On Aug 26, 2002, smiln32 from Oklahoma City, OK (Zone 7a) wrote:Splendid choice for cutting gardens, border edgings and rock gardens. Brightens shady areas. Plant in a well-drained locatoin and water generously. Protect from strong afternoon sun. |
| Negative |
carolann |
On May 30, 2004, carolann from Auburn, NH wrote: Four year old plant did not survive very cold winter which has frequent days and nights that hit between 0 and -20F. Not as hardy as noted in the entry here. |
| Positive |
penpen |
On Sep 1, 2004, penpen from North Tonawanda, NY wrote: Grows very easily from seed. I think every seed that I winter sowed germinated. Has grown steadily all summer. Didn't bloom the first year. Looking forward to blooms next summer. In my yard it seems to grow the quickest in partial shade this year as we have had a lot of rain and very few sunny days overall. THe plants in more shade have been slower to grow.
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| Positive |
CatskillKarma |
On Sep 3, 2004, CatskillKarma from West Kill, NY wrote: There was a white cultivar in my garden when I moved in. The flowers are a little weedy-looking and grow on very long stems--some over five feet. The foliage is the same as the blue cultivars and very pretty. It is very vigorous and fights its way up through a mat of bishops weed that I have been unable to eradicate. |
| Positive |
alaskagardengir |
On Sep 3, 2004, alaskagardengir from Anchorage, AK (Zone 4a) wrote:Self propagrates occasionally. Grows wild in parts of AK, and is a looked-for wild flower in the early spring. Grows on sunny mountain sides and doesn't seem to require a lot of water. It is blue up here with small and larger specimens. |
| Negative |
ccwales |
On Apr 30, 2005, ccwales from Wales, MA (Zone 6a) wrote:This plant loves my garden -- it's invasive, trying to run over well-established hostas, peonies, and herbs; I'm having a tough time killing it off. |
| Neutral |
elfmom |
On Jul 14, 2005, elfmom from Bigelow, AR wrote: I bought one plant in early spring and it grew well for several months until the southern summer began. In spite of being planted in light shade, well mulched, and watered often, the plant died. However, I liked the plant enough that I am going to try again! |
| Positive |
fluffygrue |
On May 26, 2006, fluffygrue from Manchester
(United Kingdom) (Zone 8a) wrote:Lovely plant - we have this growing in moist, not well drained, clayish soil next to a Brunnera, and they're both thriving. And it's not pestered by snails/slugs, which is a bonus. |
| Positive |
rossmullion |
On May 27, 2006, rossmullion from Wolverhampton
() wrote:This plant grows well in semi shade. The plant I have is a self setter. I have no idea where it came from. It stands erect and has a height of 1 metre. It is very showy and the flowers are light blue in colour. It is growing beside astilbes, clematis and hydrangeas. It obviously enjoys a well watered spot. |
| Negative |
Gabrielle |
On Jun 13, 2006, Gabrielle from Washington, IL (Zone 5a) wrote:I love the plant, but every one I've had died. |
| Negative |
mbhoakct76 |
On Oct 1, 2007, mbhoakct76 from Winsted, CT wrote: Mine barely seems to survive but has come back 2 yrs in zone 6.
Even when it was healthy- the flowers are very small and not very showy, Personally i find the foliage to be quite ugly and resemble a weed.
Not a easy grower! |
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Regional...This plant has been said to grow in the following regions: Anchorage, Alaska Bigelow, Arkansas Salinas, California Peoria, Illinois Fishers, Indiana Jeffersonville, Indiana Gaithersburg, Maryland Battle Creek, Michigan Osseo, Minnesota Forsyth, Missouri Piedmont, Missouri Auburn, New Hampshire Manchester, New Hampshire Merrimack, New Hampshire Egg Harbor Township, New Jersey West Kill, New York Cincinnati, Ohio Summerville, South Carolina Knoxville, Tennessee Viola, Tennessee Kalama, Washington Olympia, Washington Poulsbo, Washington
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