General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Partial or Dappled Shade
Partial Shade to Full Shade
Water Preferences: Mesic
Minimum cold hardiness: Zone 3 -40 °C (-40 °F) to -37.2 °C (-35)
Maximum recommended zone: Zone 9b
Plant Height: 9 to 18 inches (23-46cm)
Plant Spread: 6 to 9 inches (15-23cm)
Fruit: Showy
Other: Green lidded capsules.
Flowers: Showy
Flower Color: White
Bloom Size: Under 1"
1"-2"
Flower Time: Late winter or early spring
Spring
Propagation: Seeds: Stratify seeds
Needs specific temperature: needs cold, warm at 80º F then cold again
Other info: 1000ppm GA3 will speed up the warm cycle
Propagation: Other methods: Division
Miscellaneous: Endangered

Image
Common names
  • Twinleaf
  • Helmet Pod
  • Ground Squirrel Pea
  • Rheumatism Root
  • Yellow Root

Photo Gallery
Photo by _Bleu_
Location: Victoria, BC
Date: 2024-03-30

Date: 2014-05-04
Location: My garden in St Louis
Date: 2017-03-24
Location: Victoria, BC
Date: 2022-05-29
Location: Southern Maine
Date: April 22, 2023
Location: My garden in St Louis
Date: 2016-03-26
Location: Wallsend, Tyne and Wear, England
Date: 2021-04-09
Jeffersonia diphylla
Location: RHS Harlow Carr, Yorkshire
Date: 2017-03-25
Photo by AntMan01
Location: my garden, Gent, Belgium
Date: 2011-02-22
Just emerging from the soil..
Location: My garden in southeast Nebraska
Date: 2012-03-23
Photo by AntMan01
Location: My garden in southeast Nebraska
Date: 2012-03-23
Location: My garden in Gent, Belgium
Date: 2010-04-15

photo credit: Kevin Gepford
Location: my garden, Gent, Belgium
Date: 2011-03-29
Location: My garden in southeast Nebraska
Date: 2012-03-23
Photo by AntMan01
Location: My garden, Calgary, Alberta, Canada; zone 3.
Date: 2011-05-30

Photo Courtesy of Lazy S'S Farm Nursery.
  • Uploaded by Joy

Photo Courtesy of Lazy S'S Farm Nursery.
  • Uploaded by Joy

Photo Courtesy of Lazy S'S Farm Nursery.
  • Uploaded by Joy

photo credit: Fritzflohrreynolds

Date: 2018-05-04
Location: my garden, Gent, Belgium
Date: 2011-03-29
Location: Tennessee
photo courtesy of Sunlight Gardens, www.sunlightgardens.com

Date: 2014-05-01

USFW
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