Toxic Plant Known to be toxic - Toxic if ingested by mammals and skin irritant.
Image of Caltha palustris
Source: OWSL
image of Flowering plant
Caltha palustris
Yellow Marsh Marigold
Populage des marais

Synonyms

common marsh marigold
cowflock
cowslip
kingcup
marsh marigold
souci d'eau
No seeds available for this plant.
We currently accept seeds for this plant
Bloom Colour: Yellow Bloom Period: Apr - Jun
Max Height: 2.0 feet
Max Width: 1.5 feet (spreads by rhizome)
Light Condition:
Full sun More than 6 hours of direct sun a day
Part shade More than 2 or 3 hours but less than 6 hours of direct sun a day
Soil conditions:
Moisture wet Tolerates wet soil condition
Lifespan: Perennial plants that will that come back year after year
Gardener Experience:
plant spread by rhizome Spreads by rhizome
plant germinate easy Easy to germinate
Landscape Uses:
wetland garden Suitable for wetland garden
rain garden Suitable for rain gardens
shoreline_rehab Suitable for shoreline rehabilitation
Ecological Benefits:
butterfly host Butterfly host
Tolerates:
Deer Resistant Deer resistant
Rabbit Resistant Rabbit resistant
Limestone Tolerant Tolerates limestone conditions
Sand Tolerant Tolerates sandy conditions
Juglone Tolerant Tolerates juglone conditions
Transplantation Tolerant Tolerates transplantation
Special Features and Considerations:
causes skin rashes This plant causes skin rashes

Plant Location

Native to Ottawa region: Yes

Distribution according to VASCAN

Distribution: Caltha palustris
Ephemeral Native Introduced Excluded Extirpated Doubtful Absent

Thrives in Ecozones

  • Taiga Plains
  • Atlantic Maritime
  • Taiga Shield
  • Boreal Plains
  • Montane Cordillera
  • Hudson Plains
  • Boreal Shield
  • Pacific Maritime
  • Mixed Wood Plains

Ecological Benefits

Butterflies Supported by Caltha palustris

No butterfly data available for this plant.

Specialized Bees Supported by Caltha palustris

No bee data available for this plant.

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

Complementary Plants

  • No complementary plants found.

Substitute For Non-Native Plants

  • Butomus umbellatus (Flowering Rush)
  • Iris pseudacorus (Yellow Iris)
  • Iris (Iris Cultivars)

Sowing Information

Download Seed Envelope Labels (PDF)
  • Sowing depth: Sow just below surface
  • Sow by January
  • Stratification duration: 90 days
  • Notes: Sow promptly. Can be kept in fridge up to 2 months.

Harvesting and Seed Sharing

  • Harvest start month: June
  • Harvesting indicator:
    • Pods are open
  • Harvesting:
    • Open the pod, remove seeds
  • Seed viability test:
    • No test needed before donating
  • Packaging measure: 1 rounded 1/8 teaspoon
  • Seed storage:
    • Keep moisten and cool, in a ziploc bag, in the fridge, with the seeds in soil, paper towel or coffee filter, until donation
  • Cultivar: Yes, do not donate unless you know source, and there are no known cultivars in your garden or at proximity
  • Harvesting video: Watch here

Toxicity Notes

Toxic if ingested by mammals and skin irritant.