Photo by Melody

PlantFiles: Potato
Solanum tuberosum 'All Blue'

Family: Solanaceae (so-lan-AY-see-ee) (Info)
Genus: Solanum (so-LAN-num) (Info)
Species: tuberosum (too-ber-OH-sum) (Info)
Cultivar: All Blue
Additional cultivar information: (aka Black Russian, Blue of Sweden, Blue Marker, Blue Congo, Davis Purple, Eureka Purple, Fenton Blue, Purple Marker, Purple Mountain, Russian Blue, Shaw #7)

» View all varieties of Potatoes

2 vendors have this plant for sale.

7 members have or want this plant for trade.


9-12 in. (22-30 cm)
12-15 in. (30-38 cm)

Tuber Type:
Hybrid Tuber
Landrace - Heritage

Sun Exposure:
Full Sun

Days to Maturity:
81 to 90 days

Bloom Color:
Medium Blue

Skin Color:

Skin Texture:

Flesh Color:

Tuber Shape:

Tuber Size:

Typical Yield:

Moist (multi-purpose)

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There are a total of 17 photos.
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3 positives
3 neutrals
No negatives

Gardeners' Notes:

Neutral strange2u On Apr 12, 2013, strange2u from Hinsdale, IL wrote:

According to Wood Prairie Farm, All-Blue has deep purple skin and flesh, with great flavor and a moist texture. It's best in a salad, baked or boiled.

Positive curzio On Dec 3, 2008, curzio from Kenosha, WI wrote:

This variety has a large number of names: it can be found also listed as Black Russian, Davis Purple, Eureka Purple, Fenton Blue, Purple Marker, Purple Mountain, Shaw #7, and Blue of Sweden. This may be an interesting debate: different names for the same cultivar originated because of marketing - but also - different names show a different history for cultivars grown in different regions of Russia or Skandinavia. Different soils in time have changed the genetics of the cultivars slightly ... the difference is so small that genetic fingerprinting is not yet able to tell the difference. BUT FYI AgriCanada the Canadian Agency similar to the USDA recommends to keep the cultivars separate with different names. I follow this advise and have a large catalog of blues. The same agency also reports that the Congo variety is believed to have been crossed in 1900. More information can be found by googling Kenosha Potato Project.

Neutral berrygirl On Mar 1, 2007, berrygirl from Braselton, GA (Zone 7b) wrote:

Noted to be a good keeper with a high mineral content. 90-110 days.

Neutral Farmerdill On Feb 14, 2006, Farmerdill from Augusta, GA (Zone 8a) wrote:

Earliest all-blue type, with purple skin and lavender flesh – oblong tubers which have fingerling characteristics when harvested early – unique roasting and baking qualities.

Positive tweezle On Feb 24, 2005, tweezle from State College, PA (Zone 5b) wrote:

These medium size tubers are great for all kinds of cooking and baking with a really nice flavor. The potato is not as resistant to scab as others. To keep the blue color, add a tablespoon or two of vinegar to your cooking water. Makes a lovely patriotic looking salad when made with All Red and a regular white potato. The kids loved them!

Positive Evert On Jan 2, 2003, Evert from Helsinki
Finland (Zone 4b) wrote:

Very nice looking potato, the purple colour gets lighter after boiling. Also known as 'Blue Kongo', and 'Blå kongo'. Mainly cultivated in Scandinavia nowadays.


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

Chugiak, Alaska
Salina, Kansas
Eveleth, Minnesota
Kenosha, Wisconsin

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