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
Bloom Color: Medium Blue Purple White/Near White
Bloom Time: Mid Summer
Other details: This plant is attractive to bees, butterflies and/or birds Requires consistently moist soil; do not let dry out between waterings
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 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
On Jun 7, 2012, ms_greenjeans from Hopkins, MN (Zone 4a) wrote:
I started with two of these, planted on the east side of my yard and shaded by a large shrub, and I have totally neglected them. They grow quite tall in my clay soil, have come back five years in a row, and they bloom nicely. If I cut the flower stalks off, they rebloom sometimes two or three times a summer. I have divided the original two plants and purchased a couple more. No reseeding at all (I rather wish they would). I love the lush ferny foliage.
On May 12, 2010, wendymadre from Petersburg, VA wrote:
In my Zone 7a garden, in Petersburg, Virginia, I have had this plant fail several times, in both solid and variegated leaf. I don't know if it's the plant, or me (I feel guilty giving our experience a negative rating). It could be that it does not like the prolonged heat and humidity of our summers, but I don't remember if it survived long enough to even experience them. I will try it again (when I have some money to throw away) next to the Solomon's seal, or where I have some epimedium and thalictrum thriving. It may be that I have amended the soil enough in those places that it will survive now. I can't say that I've noticed it around here in other people's yards.
On May 6, 2010, akcrafter from Philadelphia, PA wrote:
I grew this plant in Anchorage, Alaska, where it seeded aggressively. Pretty plant with hosta, yarrow and ferns, but I grew to hate it there because it was so hard to control. My soil was moist and peaty which it clearly adored. I impulsively bought a variegated form and it did not seem as aggressive. My plants were about two feet in height and nicely full. They liked the light shade offered by the taller ferns and yarrow around them.
I am now trying it out in Philadelphia, PA in virtually the same soil and plant combination, but with a dramatic difference in climate. I've already discovered how easy things reseed here so I know that I will have to grab those seed heads before they fill my yard with plantlets.
On Mar 19, 2010, burkgrow from Lancaster, PA wrote:
I agree that this plant can be a tough one to grow. I had no success growing it in clay soil. It just stayed small and some died. I moved the remaining one to a well drained rich soiled sight and it has flourished.
On Jun 5, 2008, trioadastra from Ellsworth, WI (Zone 4a) wrote:
I grew two of these from seed. One didn't survive the summer in my clay soil, the other returned this spring with a vengence! I thought it was a 2 to 3 footer, but mine has reached 4 feet tall! I'm waiting for it to stop flowering so I can cut it back. -Update- I cut it back to 12", but left some seedpods, and it is flowering again- mid July.
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!
On May 27, 2006, rossmullion from Wolverhampton United Kingdom 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.
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!
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.
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.
On Sep 1, 2004, penpen from North Tonawanda, NY (Zone 6a) 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.
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.
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.
This plant has been said to grow in the following regions:
, Washington D.c., Anchorage, Alaska (2 reports) Bigelow, Arkansas Salinas, California Cordele, Georgia Bellevue, Illinois Galva, Illinois Fishers, Indiana Oak Park, Indiana Warren Park, Indiana Laytonsville, Maryland Battle Creek, Michigan Owosso, Michigan Saginaw, Michigan Hopkins, Minnesota Maple Grove, Minnesota Forsyth, Missouri Piedmont, Missouri Auburn, New Hampshire East Merrimack, New Hampshire Pinardville, New Hampshire Egg Harbor Township, New Jersey Alden, New York Nineveh, New York West Islip, New York West Kill, New York Pembina, North Dakota Akron, Ohio Fruit Hill, Ohio Wren, Ohio Portland, Oregon Bellefonte, Pennsylvania Lancaster, Pennsylvania Philadelphia, Pennsylvania Lincolnville, South Carolina Knoxville, Tennessee Viola, Tennessee Montpelier, Vermont Chimacum, Washington Kalama, Washington Langley, Washington Olympia, Washington Poulsbo, Washington Ellsworth, Wisconsin Bessemer Bend, Wyoming