Image of Polanisia dodecandra
Source: Krzysztof Ziarnek
image of Flowering plant
Polanisia dodecandra
Common Clammyweed
Polanisie à douze

Obsolete Names

stinking clammyweed
Seeds available at table Full Sun
We currently accept seeds for this plant
Bloom colour: Pink Bloom period: Jul - Sep
Max Height: 2.0 feet
Max Width: 2.0 feet
Light condition:
Full sun More than 6 hours of direct sun a day
Soil conditions:
Moisture dry Tolerates dry soil condition
Lifespan: Annual plants that have a lifespan of one year
Gardener Experience:
does not spread Does not spread uncontrollably
plant germinate easy Easy to germinate
plant self seeding Self-seeding
Landscape uses:
rock garden Suitable for rock gardens
container suitable Suitable for container garden
school garden Suitable for school gardens
Ecological Benefits: No ecological benefits information available.
Tolerates:
limestone Tolerant Tolerates limestone conditions
transplantation Tolerant Tolerates transplantation
Special Features and Considerations:

Plant Location

Native to Ottawa region: No

Distribution according to VASCAN

Distribution: Polanisia dodecandra
Ephemeral Native Introduced Excluded Extirpated Doubtful Absent
View taxonomy on Canadensys

View on iNaturalist

Thrives in Ecozones

  • Boreal Plains
  • Prairies

Ecological Benefits

Butterflies Supported by Polanisia dodecandra

No butterfly data available for this plant.

Specialized Bees Supported by Polanisia dodecandra

No bee data available for this plant.

Plants that grow in similar conditions, that bloom at the same time.

Complementary Plants

Substitute For Non-Native Plants

  • Delphinium (Delphinium)
  • Asclepias (Milkweed Cultivars)
  • Asclepias curassavica (Tropical Milkweed)
  • Cirsium arvense (Canada Thistle)
  • Leucanthemum (Shasta Daisy)
  • Gerbera (Gerbera Daisy)
  • Hesperis matronalis (Dame Rocket)

Sowing Information

Download Sowing Label (PDF)
  • Sowing depth: Sow just below surface
  • Sow by March
  • Stratification duration: 30 days
  • Self-seeding

Harvesting and Seed Sharing

  • Harvest start month: September
  • Harvesting indicator: Pods are slightly open and seeds inside are dark
  • Harvesting mean: Open the pod, remove seeds
  • Seed viability test: No test needed before donating
  • Packaging measure: 1 rounded 1/8 teaspoon
  • Seed storage: Air dry in paper bag or open container, for a few days until crisp, shaking seeds to move them once in a while to prevent molding
  • At least one cultivar: No, you can donate without knowing the source as there are only straight species
  • No harvesting video available at this time.

Toxicity Notes

Inadequate information on toxicity found.