PlantFun
Plant Needs
Sunlight
Full sun to partial shade; grows best in full sun for optimal canopy development and acorn production
Watering
Deep, infrequent watering; drought-tolerant once established; avoid overwatering to prevent root rot
Temperature
Hardy to -20°C; tolerates hot summer temperatures up to 35°C; requires cold stratification for acorn germination
Characteristics
- Leaf: Oblong-lanceolate with sharp, bristle-tipped teeth; glossy green above, pale gray-green beneath; turns yellow-brown in autumn
- Flower: Monoecious; male catkins are yellow-green and pendulous; female flowers are small, reddish, clustered at branch tips
- Fruit: Acorns with cup scales forming a fringed, sawtooth-like rim; mature over 18 months
Care Guide
Watering
Deep water every 7–10 days during dry spells; maintain moist but not waterlogged soil
Fertilization
Apply balanced slow-release fertilizer once in early spring before new growth emerges. Avoid high-nitrogen fertilizers, which can promote weak, leggy growth
Eggshell powder topdress：Crush dried, rinsed eggshells into fine powder; sprinkle lightly around the tree base; water thoroughly to release calcium into the soilPruning
- Remove dead, damaged, or crossing branches in late winter to improve airflow and reduce disease risk
- Thin overcrowded canopy branches to allow sunlight penetration to lower foliage
- Avoid heavy pruning; maintain the tree's natural rounded form to support wildlife habitat
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Mildly toxic; ingestion of acorns or leaves may cause vomiting, diarrhea, or lethargy
Humans: Contains gallotannins; ingestion of large quantities of acorns or leaves may cause mild gastrointestinal upset
Garden Uses & Culture
Culture: Symbolizes strength, longevity, and stability in traditional East Asian culture
Usage: Ornamental shade tree for parks and large landscapes; acorns provide food for deer, squirrels, and birds
