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PlantFiles: Hollyhock
Alcea rosea 'Nigra'

 
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Family: Malvaceae (mal-VAY-see-ee) (Info)
Genus: Alcea (al-KEE-uh) (Info)
Species: rosea (RO-zee-uh) (Info)
Cultivar: Nigra

Synonym:Alcea rosea var. nigra

6 vendors have this plant for sale.

26 members have or want this plant for trade.

Category:
Biennials
Perennials

Height:
4-6 ft. (1.2-1.8 m)
6-8 ft. (1.8-2.4 m)

Spacing:
24-36 in. (60-90 cm)

Hardiness:
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)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)

Sun Exposure:
Full Sun

Danger:
Unknown - Tell us

Bloom Color:
Dark Purple/Black
Maroon (Purple-Brown)

Bloom Time:
Mid Summer
Late Summer/Early Fall

Foliage:
Herbaceous

Other details:
Average Water Needs; Water regularly; do not overwater
Self-sows freely; deadhead if you do not want volunteer seedlings next season

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:
Unknown - Tell us

Propagation Methods:
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; sow indoors before last frost
From seed; direct sow after last frost

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

By saya
Thumbnail #1 of Alcea rosea by saya

By Mike_Hieber
Thumbnail #2 of Alcea rosea by Mike_Hieber

By saya
Thumbnail #3 of Alcea rosea by saya

By Baa
Thumbnail #4 of Alcea rosea by Baa

By asturnut
Thumbnail #5 of Alcea rosea by asturnut

By Vivify
Thumbnail #6 of Alcea rosea by Vivify

By handhelpers
Thumbnail #7 of Alcea rosea by handhelpers

There are a total of 17 photos.
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Profile:

4 positives
3 neutrals
No negatives

Gardeners' Notes:

RatingAuthorComment
Positive fburg696 On Jan 17, 2008, fburg696 from Farmersburg, IN wrote:

I wish I could rate my experience with this plant as VERY POSITIVE because I really love this plant.It was one of the first plants in my garden.The color is very nice, great to have in the border.I have my whole sidewalk lined with these guys, a true sight for sore eyes.
I just can't say enough good things about this plant. I highly recommend it.

Positive gardenbugde On Jun 14, 2007, gardenbugde from Smyrna, DE
(Zone 7a) wrote:

I started this from seed last summer and it wintered over very well. I didn't even bother to trim it back since it wasn't that tall. It grew like gangbusters this Spring and is now almost 3 feet high. It's first flower opened on June 12th. I love the color! I've read that you should cut back to 6" in the fall. I guess I'll have to do that this year. I'm trying to get some more to grow from seed. If I get seed from mine this year, I'll be happy to share with others!

Positive berrygirl On Mar 4, 2007, berrygirl from Braselton, GA
(Zone 7b) wrote:

While I don't grow this particular named one, I do grow another "black" hollyhock- 'The Watchman'. In my humble, non-expert opinion there isn't much difference in them at all. The only differences I have noted are the fact that there are "black" single flowered varieties and also there are double flowered ones. Irregardless of what name they go by I love them!

From the Seed Saver's Exchange: "Grown by Thomas Jefferson at Monticello, but mentioned even earlier by John Parkinson in 1629. He described this single hollyhock as being "of a darke red like blackwood." Appears black on overcast days, but will have a hint of red in the bright sun. Plant next to a white fence for a spectacular contrast. Self-seeding biennial, 5-6' tall."

Neutral digging_dirt On Feb 7, 2006, digging_dirt from comebychance, NL
(Zone 5b) wrote:

ped i think its a biannual most hollyhocks are,i know i grow night watchman it was a the nices hollyhock i ever grow and wouldnt you know it's a biannual what a bummer

Neutral Ped On Jul 31, 2003, Ped from Mt. Pearl, NL
(Zone 5b) wrote:

When I bought this plant, it was called a Texas Hollyhock. when it bloomed, it was the most beautiful flower and I was so happy. That was last year, this year it did not return, at all.

Positive asturnut On Feb 1, 2003, asturnut from Maurice River Township, NJ
(Zone 7a) wrote:

Love this magnificent plant. The flowers are absolutely the closest you will find to black anywhere. I have several black hollyhocks and this one is the truest. Love it!

Neutral Baa On Jan 15, 2003, Baa wrote:

One of the 'black' flowered cultivars of Hollyhock. It bears large, dark purple/maroon flowers with a pale yellow throat.

Regional...

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

San Mateo, California
Watsonville, California
Smyrna, Delaware
Plainfield, Illinois
Farmersburg, Indiana
Dubuque, Iowa
Peosta, Iowa
Madison Heights, Michigan
Webberville, Michigan
Mathiston, Mississippi
Granville, New York
Warren, Ohio
Hulbert, Oklahoma
Oklahoma City, Oklahoma
Portland, Oregon
Coopersburg, Pennsylvania
Lafayette, Tennessee
Rockwall, Texas
Roanoke, Virginia
Kalama, Washington
Marysville, Washington
Seattle, Washington
Elkins, West Virginia
Mukwonago, Wisconsin



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