Ring-Cup Oak
Quercus glauca
- Native to:
- China, Hainan, India, Japan, Korea, Laos, Myanmar, Nansei-shoto, Nepal, Taiwan, Vietnam
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Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Fagaceae
- Genus:
- Quercus
- Species:
- Quercus glauca
- USDA Symbol:
- QUGL2
Growth Characteristics
- Height:
- 2000 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Medium
- Bloom Months:
- apr,may
Keystone Species Ranking
- Caterpillar Keystone:
- ★★★★★ Butterfly & moth species supported by this genus (NWF)
Garden & Ecology Notes
- Wildlife Value:
- birds, small mammals
- Fire Ecology:
- Fire adapted — tolerates or benefits from fire
- Fire Notes:
- Resprouts from root crown following fire damage; thick bark provides some protection on mature trees.
Soil Requirements
- Soil Type:
- rich, well-drained loamy soil
- pH:
- 5.5 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- consistently moist
- Notes:
- native to forested slopes and valleys
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 60–90 days
- Germination Time:
- 30–60 days
- Notes:
- Acorns have no deep dormancy but benefit from cold stratification. Sow fresh for best results.
The above propagation data sourced from Claude AI