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Description
Iris Hollandica Casablanca, also known as Dutch Iris, is a stunning perennial plant that is native to the Mediterranean region. It is a member of the Iridaceae family and is one of the most popular iris varieties due to its striking appearance and ease of cultivation.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Tracheophyta |
| Class | Liliopsida |
| Order | Asparagales |
| Family | Iridaceae |
| Genus | Iris |
Appearance
Iris Hollandica Casablanca features tall, slender stems that can grow up to 28 inches tall. The flowers are large and showy, with six petals that form a distinctive shape resembling a bird in flight. The petals are a crisp white color with yellow and purple markings that lead to the center of the flower. The foliage is long and slender, with green, grass-like leaves that emerge from the base of the plant.
Care Guide
Water: Dutch Iris prefer moist, well-drained soil. Water the plants deeply once a week, providing enough water to saturate the soil to a depth of 6-8 inches.
Fertilization: Fertilize the plants in the spring with a balanced, all-purpose fertilizer. Repeat every 4-6 weeks throughout the growing season.
Soil: Dutch Iris prefer soil that is rich in organic matter and well-drained. If your soil is heavy or clay-like, amend with compost or other organic matter to improve drainage and fertility.
Sunlight: Dutch Iris prefer full sun to partial shade. Plant in a location that receives at least 6 hours of direct sunlight each day.
Hardiness Zones: Iris Hollandica Casablanca is hardy in USDA zones 5-9. In colder climates, plant the bulbs in the fall and mulch heavily to protect from freezing temperatures.
Common Pests & Diseases
Dutch Iris are relatively pest and disease-resistant, but they can be susceptible to a few common issues. Bulb rot can occur in wet, poorly-drained soil, and can cause the bulbs to rot and die. Aphids and thrips can occasionally infest the plants, causing damage to the foliage and flowers. To prevent these issues, plant in well-drained soil and monitor the plants for signs of pests.
Habitat
Iris Hollandica Casablanca is native to the Mediterranean region, where it grows in sunny, well-drained areas. It is commonly grown as a garden plant throughout the world and is often used in cut flower arrangements.
Question and Answer
Q: When should I plant Iris Hollandica Casablanca bulbs?
A: Plant the bulbs in the fall, 4-6 weeks before the first frost.
Q: How often should I fertilize Iris Hollandica Casablanca?
A: Fertilize with a balanced, all-purpose fertilizer every 4-6 weeks throughout the growing season.
Q: Can Iris Hollandica Casablanca be grown in containers?
A: Yes, Dutch Iris can be grown in containers. Use a well-draining potting mix and provide full sun to partial shade.
Q: How do I propagate Iris Hollandica Casablanca?
A: Dutch Iris can be propagated by dividing the bulbs in the fall once the foliage has died back. Replant the bulbs immediately.
Related Plants
- Iris Ensata
- Iris Germanica
- Iris Sibirica
- Iris Versicolor
References
- “Iris Hollandica Casablanca,” Missouri Botanical Garden, accessed September 2021, https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=281119&isprofile=0&
- “Dutch Iris,” Royal Horticultural Society, accessed September 2021, https://www.rhs.org.uk/plants/109/i-iris-hollandica-i/details
- “Dutch Iris,” University of Illinois Extension, accessed September 2021, https://extension.illinois.edu/bulbs/dutch-iris
