Kurogane Holly

Ilex rotunda

Native to:
China, Hainan, Japan, Korea, Laos, Nansei-shoto, Taiwan, Vietnam

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Aquifoliaceae
Genus:
Ilex
Species:
Ilex rotunda
USDA Symbol:
ILRO2

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Tree
Height:
1500 cm
Light Requirements:
Full Sun
Drought Tolerance:
Medium
Bloom Months:
apr,may,jun
Bloom Colors:
white, greenish-white
Evergreen Shrub:
Yes
Landscaping Shrub:
Yes

Wildlife Benefits

Butterflies & Moths:
★★★★★ Documented Lepidoptera association (GBIF)

Keystone Species Ranking

Caterpillar Keystone:
★★★★☆ Butterfly & moth species supported by this genus (NWF)
Pollen Specialist Bee Keystone:
★☆☆☆☆ Native pollen specialist bee species supported by this genus (NWF)

Garden & Ecology Notes

Wildlife Value:
birds, small mammals
Fall Color:
red

Soil Requirements

Soil Type:
rich, well-drained loamy soil
pH:
5.5 - 7.0 (slightly acidic to neutral)
Drainage:
good drainage preferred
Moisture:
consistently moist
Notes:
native to forested areas with ample organic matter

Propagation & Germination

Stratification:
Cold/moist stratification required — 60–90 days
Germination Time:
30–90 days
Notes:
Seeds benefit from cold stratification for 60-90 days to break dormancy.

ORGHPS Germination Guide: Expose to fluctuating outdoor winter temps incl. freezing for 3 months. Increase light/temp in spring.

Source: Ontario Rock Garden & Hardy Plant Society