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Description
Inula japonica, commonly known as Japanese Inula, is a hardy herbaceous perennial plant that is native to Japan. It belongs to the Asteraceae family and is a popular ornamental plant in gardens and landscapes. The plant can grow up to 2-3 feet in height and has a spread of about 1-2 feet.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Inula |
Appearance
The Inula japonica plant has long, narrow, lance-shaped leaves that are dark green in color. The leaves are arranged in an alternate pattern on the stem. The plant produces bright yellow, daisy-like flowers that bloom in the summer months. The flowers have a diameter of about 2 inches and are borne on long, slender stems. The plant has a bushy and compact growth habit and can be propagated through division.
Care Guide
Water: Inula japonica requires regular watering to keep the soil moist. However, it is important to avoid overwatering as this can lead to root rot.
Fertilization: The plant benefits from regular fertilization with a balanced fertilizer during the growing season.
Soil: The plant prefers well-draining, fertile soil that is slightly acidic to neutral in pH.
Sunlight: Inula japonica requires full sun to partial shade for optimal growth.
Hardiness Zones: The plant is hardy in USDA zones 5-9.
Common Pests & Diseases
Inula japonica is relatively pest and disease-free. However, it may be prone to root rot if overwatered. It is important to monitor the plant for signs of yellowing or wilting leaves, which may be an indication of root rot. The plant may also be susceptible to aphids, which can be controlled with insecticidal soap or neem oil.
Habitat
Inula japonica is native to Japan and can be found growing in meadows, grasslands, and mountain slopes. The plant prefers moist soil and is often found growing near bodies of water.
Question and Answer
Q: Is Inula japonica a good plant for beginner gardeners?
A: Yes, Inula japonica is a relatively easy plant to grow and maintain, making it a good choice for beginner gardeners.
Q: Can Inula japonica be grown in containers?
A: Yes, Inula japonica can be grown in containers as long as the container is large enough to accommodate the plant’s root system.
Q: Does Inula japonica attract pollinators?
A: Yes, Inula japonica is a pollinator-friendly plant and attracts bees, butterflies, and other beneficial insects to the garden.
Q: How often should Inula japonica be fertilized?
A: Inula japonica benefits from regular fertilization during the growing season. Fertilize the plant every 4-6 weeks with a balanced fertilizer.
Related Plants
- Inula helenium
- Inula racemosa
- Inula britannica
- Inula magnifica
References
- “Inula japonica Thunb.” Missouri Botanical Garden. Accessed September 20, 2021. http://www.missouribotanicalgarden.org.
- “Inula japonica.” Plant Finder. Accessed September 20, 2021. https://www.monrovia.com.
- “Inula japonica.” Royal Horticultural Society. Accessed September 20, 2021. https://www.rhs.org.uk.
