Holly

Ilex volkensiana

Native to:
Caroline Is.

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Aquifoliaceae
Genus:
Ilex
Species:
Ilex volkensiana
USDA Symbol:
ILVO2

Growth Characteristics

Height:
1500 cm
Light Requirements:
Full Sun
Drought Tolerance:
Low
Bloom Months:
apr,may,jun
Bloom Colors:
white

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

Soil Requirements

Soil Type:
rich, well-drained loamy soil
pH:
5.5 - 6.5 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
consistently moist
Notes:
native to montane forests, prefers organic matter

Propagation & Germination

Stratification:
Warm then cold/moist stratification (double dormancy) — 90–180 days
Germination Time:
30–365 days
Notes:
Ilex seeds typically exhibit double dormancy and may take 1-2 years to germinate. Warm stratification followed by cold stratification is often required.

The above propagation data sourced from Claude AI

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