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Description
Caltha Introloba, commonly known as giant marsh marigold, is a perennial herbaceous plant that belongs to the family Ranunculaceae. It is native to the western United States and Canada, where it grows in wetlands, marshes, and along streams and rivers.
Taxonomic Information
| Domain | Eukaryota |
| Kingdom | Plantae |
| Phylum | Tracheophyta |
| Class | Magnoliopsida |
| Order | Ranunculales |
| Family | Ranunculaceae |
| Genus | Caltha |
Appearance
Giant marsh marigold has large, heart-shaped, glossy green leaves that can grow up to 12 inches in diameter. It produces bright yellow flowers on tall stems that can reach up to 3 feet in height. The flowers have five to nine petals and bloom in early spring.
Care Guide
Giant marsh marigold prefers to grow in moist soil and full sun to partial shade. It requires regular watering, especially during hot and dry weather. Fertilization is not necessary, but a layer of organic mulch can be applied to help retain moisture and suppress weeds. It is hardy in USDA zones 4-8.
Common Pests & Diseases
Giant marsh marigold is generally resistant to pests and diseases, but may be susceptible to fungal leaf spots and root rot if grown in poorly drained soil.
Habitat
Giant marsh marigold is native to wetlands, marshes, and along streams and rivers in the western United States and Canada. It can also be found in bogs and swamps.
Question and Answer
Q: Can giant marsh marigold be grown in containers?
A: Yes, it can be grown in containers filled with moist soil and placed in a sunny location. Make sure to keep the soil consistently moist.
Q: When is the best time to plant giant marsh marigold?
A: It is best to plant in early spring, after the last frost, or in the fall.
Q: How often should giant marsh marigold be fertilized?
A: Fertilization is not necessary, but a layer of organic mulch can be applied in the spring to provide nutrients and help retain moisture.
Q: Can giant marsh marigold be propagated from cuttings?
A: Yes, it can be propagated from stem cuttings taken in the spring or fall.
Related Plants
- Caltha palustris (Marsh Marigold)
- Caltha biflora (Twoflower Marsh Marigold)
- Caltha leptosepala (White Marsh Marigold)
References
- Washington Native Plant Society. (n.d.). Caltha introloba. Retrieved from https://www.wnps.org/plants/caltha-introloba
- USDA Plants Database. (n.d.). Caltha introloba. Retrieved from https://plants.usda.gov/core/profile?symbol=CAIN7
- University of Wisconsin-Madison Arboretum. (n.d.). Caltha introloba. Retrieved from https://arboretum.wisc.edu/trees-plants/caltha-introloba/
