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Description
Cirsium Douglasii, also known as Douglas Thistle, is a beautiful perennial plant that belongs to the family Asteraceae. It is native to North America and can be found in the western part of the United States and Canada. This plant can grow up to 3 feet tall and has a spread of 2 feet. Cirsium Douglasii produces pink to purple flowers that bloom from July to September. It is a great addition to any garden due to its stunning appearance and easy care requirements.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Cirsium |
Appearance
Cirsium Douglasii is a stunning plant with a unique appearance. It has a tall, erect stem with long, spiny leaves that are green on the upper side and white on the underside. The plant produces multiple flower heads that are pink to purple in color and have a diameter of up to 2 inches. The flowers have a distinctive globe shape and are surrounded by spiny bracts. The plant blooms from July to September and attracts a variety of pollinators such as bees and butterflies.
Care Guide
Cirsium Douglasii is an easy plant to care for and can thrive in many different environments. Here are some tips on how to care for this beautiful plant:- Water: Cirsium Douglasii requires moderate watering. The soil should be kept moist but not waterlogged.- Fertilization: This plant does not require frequent fertilization. A slow-release fertilizer can be applied once a year in the spring.- Soil: Cirsium Douglasii prefers well-draining soil that is rich in organic matter. A pH level of 5.5 to 7.0 is ideal.- Sunlight: This plant prefers full sun but can also tolerate partial shade.- Hardiness Zones: Cirsium Douglasii can grow in USDA Hardiness Zones 5 to 9.
Common Pests & Diseases
Cirsium Douglasii is generally resistant to pests and diseases. However, it can be affected by aphids, spider mites, and powdery mildew. These can be controlled with insecticidal soap and fungicides. It is also important to remove any infected or damaged parts of the plant to prevent the spread of disease.
Habitat
Cirsium Douglasii is native to North America and can be found in the western part of the United States and Canada. It grows in a variety of habitats such as meadows, prairies, and open woodlands. This plant prefers well-draining soil and full sun but can also tolerate partial shade.
Question and Answer
Q: Is Cirsium Douglasii a good plant for attracting pollinators?
A: Yes, Cirsium Douglasii attracts a variety of pollinators such as bees and butterflies.
Q: Does Cirsium Douglasii require frequent fertilization?
A: No, this plant does not require frequent fertilization. A slow-release fertilizer can be applied once a year in the spring.
Q: Can Cirsium Douglasii grow in partial shade?
A: Yes, this plant prefers full sun but can also tolerate partial shade.
Q: What are some common pests and diseases that affect Cirsium Douglasii?
A: Cirsium Douglasii can be affected by aphids, spider mites, and powdery mildew.
Related Plants
– Cirsium arvense (Canada Thistle)- Cirsium vulgare (Bull Thistle)- Cirsium altissimum (Tall Thistle)- Cirsium palustre (Marsh Thistle)
References
– “Cirsium Douglasii,” Missouri Botanical Garden, accessed October 26, 2021, https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=b571.- “Cirsium Douglasii,” PlantFiles, accessed October 26, 2021, https://davesgarden.com/guides/pf/go/210875/.- “Cirsium Douglasii,” USDA Plants Database, accessed October 26, 2021, https://plants.usda.gov/core/profile?symbol=CIDO2.
