Photo by Melody

PlantFiles: Twinleaf
Jeffersonia dubia

Family: Berberidaceae (bear-ber-id-AY-see-ee) (Info)
Genus: Jeffersonia (Jefferson-ee-a) (Info)
Species: dubia (DOO-bee-uh) (Info)

Synonym:Plagiorhegma dubia

One vendor has this plant for sale.

6 members have or want this plant for trade.


6-12 in. (15-30 cm)

Unknown - Tell us

USDA Zone 3a: to -39.9 °C (-40 °F)

Sun Exposure:
Light Shade
Partial to Full Shade
Full Shade

Unknown - Tell us

Bloom Color:
Light Blue

Bloom Time:
Mid Spring


Other details:
Requires consistently moist soil; do not let dry out between waterings

Soil pH requirements:
5.1 to 5.5 (strongly acidic)
5.6 to 6.0 (acidic)

Patent Information:

Propagation Methods:
Unknown - Tell us

Seed Collecting:
Seed does not store well; sow as soon as possible

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There are a total of 12 photos.
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2 positives
No neutrals
No negatives

Gardeners' Notes:

Positive coriaceous On May 5, 2014, coriaceous from ROSLINDALE, MA wrote:

A beautiful spring woodland wildflower for acid soil. Flowers can be medium blue-violet, very fleeting. Leaves are lovely. Goes dormant in late spring.

I find it easy to please. Self-sows.

Jeffersonia do not lend themselves to division, and are propagated by seed.

Positive philomel On Apr 21, 2003, philomel from Castelnau RB Pyrenées
France (Zone 8a) wrote:

This is an exquisite little woodland plant from Japan.
It likes humus rich, acidic soil in a shady place with plenty of leaf mould that is not allowed to dry out and are recommended for growing in a peat bed as they resent disturbance and should not have other plants encroaching upon them.
Propogation is best from seed, which should be gathered and sown as soon as ripe.
The flowers appear when the leaves are only half unfurled. Thes leaves are purple-tinged while developing, but become green after the flowers are shed.
The whole effect is very pleasing.
There is also a white flowered form.


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

Shelburne Falls, Massachusetts
Eveleth, Minnesota
Saint Cloud, Minnesota
Saint Louis, Missouri
Voorheesville, New York
Wilkes Barre, Pennsylvania
De Pere, Wisconsin

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