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PlantFiles: Twin flower
Jeffersonia dubia

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

Synonym:Plagiorhegma dubia

Category:
Perennials

Height:
6-12 in. (15-30 cm)

Spacing:
Unknown - Tell us

Hardiness:
USDA Zone 3a: to -39.9 °C (-40 °F)

Sun Exposure:
Light Shade
Partial to Full Shade
Full Shade

Danger:
Unknown - Tell us

Bloom Color:
Light Blue
Violet/Lavender

Bloom Time:
Mid Spring

Foliage:
Herbaceous

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:
Unknown - Tell us

Propagation Methods:
Unknown - Tell us

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

Click thumbnail
to view:
By philomel

By philomel

By Galanthophile

By Todd_Boland

By kniphofia

There are a total of 8 photos.
Click here to view them all!

Profile:

1 positive
No neutrals
No negatives

Gardeners' Notes:

Rating	Author	Comment
Positive	philomel	On Apr 21, 2003, philomel from Termes d'Armagnac 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.

Regional...

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

, (2 reports)
Eveleth, Minnesota
Voorheesville, New York

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