Kurogane holly (Ilex rotunda) is one of the most attractive hollies and is an evergreen that will grow to 15 m tall. Native to Japan it has been growing in the United States for some 200 years. It blooms in spring with bright red berries ripening in fall to winter offering a stunning display for winter.
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Perennial
Lifespan
Tree
Plant Type
Late spring, Early summer
Bloom Time
Mid fall, Late fall, Early winter
Harvest Time
15 m
Plant Height
11 m to 14 m
Spread
Green, Blue
Leaf Color
5 mm
Flower Size
Red
Fruit Color
White, Purple
Flower Color
On This Page
Images
Distribution
Culture
Toxicity
Care Guide
FAQs
Common Diseases
Images of Kurogane holly
Distribution of Kurogane holly
Distribution Map
Kurogane holly is a plant native to broadleaf forests in East Asia. In its native range, it spans several major regions, including parts of the eastern Asian continent. Apart from its natural habitats, kurogane holly has been introduced and is cultivated in areas of Western Asia, where it has established itself beyond its endemic locales.
Native
Cultivated
Invasive
Introduced
No species reported
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Habitat
Forests, Mountain slopes
Hemisphere Trend Curve
Northern
Sorthern
Culture
Garden Use
With its volume, dark, spiny foliage, and attractive red or yellow berries, kurogane holly makes an excellent and unusual hedging shrub. Being extremely heat and drought tolerant, it is ideal to use as a hedge or screen in places where less drought-tolerant plants can't thrive. It is also effective as an espalier, specimen shrub, or small tree due to its decorativeness.
Symbolism
Protection, Anti-Lightning, Luck
Interesting Facts
Kurogane holly has been reported as a toxic plant, but the compounds found in kurogane holly are still under scientific research.
Name Story
Kurogane holly||Small-fruited holly||Round leaf holly: Ilex rotunda is called 'Kurogane-mochi' in Japanese, which means 'the black iron holy'. The common English name was partly coined from the Japanese name, so this type of holy is now often referred to as kurogane holly.
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Toxicity
Kurogane holly is toxic to humans, cats, and dogs, causing poisoning through ingestion. Symptoms include gastrointestinal and neurological effects in humans, physical discomfort in cats, and gastrointestinal upset in dogs. The entire plant is toxic, so immediate veterinary care is critical upon accidental consumption by pets to ensure their health and safety. Exercise caution in environments where kurogane holly is present. Kurogane holly poses a moderate toxicity risk to dogs.
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Water:
Kurogane holly thrives in well-drained, moderately moist environments and demonstrates drought tolerance. It requires watering every two weeks and is primarily cultivated outdoors, flourishing in climates where rainfall aligns with its growth cycles.
Fertilize:
Fertilizing kurogane holly with balanced nutrition is essential for health. Use high nitrogen formulas in early spring and moderate quantities every 4-6 weeks during the growing season. Adjust feeding in fall and winter, utilizing slow-release granules to prevent root burn and support optimal growth.
Pruning:
Kurogane holly, with glossy evergreen leaves and red berries, thrives with winter pruning during dormancy. Techniques include thinning for airflow, removing damaged branches, and selective cutting to boost growth. This care enhances kurogane holly's appearance and structural strength for an attractive landscape presence.
Propagation:
The kurogane holly is propagated by sowing seeds from ripe berries in a peat-perlite mix. Consistent moisture and a stable environment are crucial for germination. Once seedlings develop true leaves, transplant them into individual containers to promote optimal growth.
Repotting:
To thrive, repot kurogane holly every 2-3 years in early spring using a container one size larger. Employ a well-draining pot to support growth, and monitor watering and light conditions for a few weeks post-repotting to minimize stress and aid recovery.
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