Photo by Melody

PlantFiles: Pale Corydalis, Rock Harlequin
Capnoides sempervirens

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Family: Fumariaceae (foo-mar-ee-AY-see-ee) (Info)
Genus: Capnoides (kap-NOH-ih-deez) (Info)
Species: sempervirens (sem-per-VY-renz) (Info)

Synonym:Corydalis sempervirens
Synonym:Corydalis glauca
Synonym:Fumaria sempervirens

2 vendors have this plant for sale.

5 members have or want this plant for trade.

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Category:
Perennials

Height:
18-24 in. (45-60 cm)

Spacing:
15-18 in. (38-45 cm)

Hardiness:
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)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Sun to Partial Shade

Danger:
N/A

Bloom Color:
Pink
Pale Yellow

Bloom Time:
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Mid Fall

Foliage:
Herbaceous
Blue-Green

Other details:
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Non-patented

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From seed; direct sow outdoors in fall
From seed; stratify if sowing indoors

Seed Collecting:
Bag seedheads to capture ripening seed
Allow pods to dry on plant; break open to collect seeds
Seed does not store well; sow as soon as possible

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There are a total of 11 photos.
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Profile:

5 positives
7 neutrals
1 negative

Gardeners' Notes:

RatingAuthorContent
Positive silversage45 On Jul 1, 2013, silversage45 from Augusta, ME wrote:

We were delighted to see that seed of this plant had come along with us when we moved from a nearby farm to our central Maine lakeside home 35 years ago. It has been a delightful presence along the border of the vegetable garden ever since. If it attempts to move into the vegetable bed, the occasional seedling is easily eradicated by simply disturbing the soil where it is emerging. We have not found it to be a nuisance in any way.

Positive Kim_M On May 13, 2011, Kim_M from Hamburg, PA (Zone 6b) wrote:

Very Lovely plant. It has a delicate look with great color combination. Have not fond it to be invasive, and actually would love for it to invade a space..ha!

Neutral wnc_native On Apr 17, 2011, wnc_native from Asheville, NC wrote:

My wife and I live in Asheville.. Kenilworth. And have been landscaping our 1920's home for 11 yrs. We were re-doing the flower bed on the north side of our home and the plant was coupled with a columbine. We haven't seen the plant in our neighborhood. Thought it was interesting that it just showed up.

Positive foxtrax On Jul 29, 2010, foxtrax from Plymouth, IN wrote:

I found this beautiful plant growing in Ontario, Canada, Zone 3 A.

Positive sillybug5 On Nov 21, 2009, sillybug5 from Winston Salem, NC (Zone 7a) wrote:

I love this plant. I have never found it to be invasive, as some reviewers have said. I only wish it was for me! I have grown it off and on for 30 years. Here in the South and in Massachusetts. You rarely see a flower with this color combination. The contrast with the blue green leaf is striking. A favorite.

Positive joeswife On Apr 19, 2009, joeswife from (Debra) Derby, KS (Zone 6a) wrote:

Love it it grows in my rock garden and is very pretty.. new for me, will have some for trades at end of summer

Neutral canipity On Jan 6, 2009, canipity from Parkesburg, PA wrote:

Bought one of these beautiful plants at a local nursery. It flowered wonderfully. I planted it but the next year I was sad to see it did not come back. A month later I was cleaning out a corner of old flower pots and was wonderfully suprised to find four new babies, flowers and all growing out of a pot filled with dirt and broken bottles. Don't know how the seeds made it there but I was. Needless to say I picked out the glass and spinkled spent seeds back in the pot. Hope I'll have new babies next year. And yes the plant was advertised as an perennial, but now I see it's probably a reseeding annual.

Neutral Sarahskeeper On Jun 21, 2008, Sarahskeeper from Brockton, MA (Zone 6a) wrote:

I found it growing at the top of a rocky hill under power lines. It's got to be tough.

Neutral aguy1947 On Jul 28, 2007, aguy1947 from Portugal Cove-St. Philip's, NL (Zone 5a) wrote:

Growing it in 2007 as a gift... The information here c.f. self-seeding is very important. I thought it might be perennial, but a self-seeding annual can be a nuisance. Many thanks to previous contributors concerning this item. Note: I do like the foliage and the flowers.

Negative Grasmussen On Sep 27, 2006, Grasmussen from Anchorage, AK (Zone 4a) wrote:

While C. sempervirens has beautiful little flowers it reseed profusely and will take over a flower bed. It is only suitable for wild areas. It grows as both an annual and a biannual. Seeds witch germinate early in the season will bloom and die in one season, but seeds witch germinate late in the season will over winter and bloom the second season. Seed can remain dormant for many years. Once it has seeded into disturbed soil, it will continue to reappear for a long time. I have been pulling it from one area for the past four years, and the area is currently full of sempervirens.

Neutral MN_Darren On Jun 20, 2005, MN_Darren from Saint Paul, MN wrote:

Rock Harlequin grows wild in Northern Minnesota, which is where I got the seeds to start mine. They have a strange tendency to appear and disappear from year to year. I think that the plants are biennial. Full sized plants never show up the following year. One year I'll have a couple, the next year, none will be visible, then the following year I'll have dozens. Sprinkle the seeds and just let them do their thing. Definitely could become invasive, but prodigal. The form is very similar to a columbine, though it's actually a relative of the bleeding hearts. The bluish foliage is interesting. Mine usually bloom from May to June, starting even before the Aquillegias.

Neutral CindyLouhoo On May 18, 2003, CindyLouhoo wrote:

I just found one of these at our camp near Clearfield, Pennsylvania. It was just starting to bloom and I hope to be able to harvest seeds from it.

Neutral gardener_mick On Jan 16, 2001, gardener_mick from Wentworth, SD (Zone 4a) wrote:

Corydalis sempervirens is a hardy annual. The foliage is a blue green and is multilobed. The flowers are pink with a yellow tip and have a single spur. They are also known as Capnoides sempervirens. They grow between 8-30" and do best in full light in dry gravelly soil and in open woodlands. These flower from July to September and favor climates with cold winters and cool summers. These flowers set a lot of seed and my have a tendancy to be invasive if not kept in check. This is a very pretty flower.

Regional...

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

Anchorage, Alaska
Wasilla, Alaska
Fairfield, California
Oakland, California
Richmond, California
Roseville, California
Derby, Kansas
Brockton, Massachusetts
Saint Helen, Michigan
West Branch, Michigan
St Paul, Minnesota
Croton-on-hudson, New York
New York, New York
Portugal Cove-st. Philip's, Newfoundland and Labrador
Biltmore Forest, North Carolina
Winston-salem, North Carolina
Pembina, North Dakota
Clackamas, Oregon
Laflin, Pennsylvania
Vancouver, Washington



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