PlantFun
Plant Needs
Sunlight
Full sun preferred; tolerates partial shade in extreme heat; avoids dense full shade
Watering
Deep water every 1–2 weeks during prolonged dry spells; avoid overwatering to prevent root rot
Temperature
Cold hardy to USDA zone 7; tolerates extreme summer heat and occasional freezing temperatures
Characteristics
- Leaf: Small, leathery, oblong to elliptical leaves with smooth or spiny margins; dark green upper surface, pale gray underside
- Flower: Inconspicuous male catkins and small female flowers; wind-pollinated
- Stem/Bark: Thick, furrowed gray-brown bark; gnarled, spreading branches with low-hanging limbs
Care Guide
Watering
Deep water every 10–14 days during dry periods; avoid frequent shallow watering
Fertilization
Apply slow-release balanced fertilizer once in early spring. Do not over-fertilize; excess nutrients may reduce drought tolerance
Eggshell powder topdressing：Crush dried eggshells into fine powder, sprinkle 1–2 tbsp around the tree’s drip line; avoid direct contact with the trunk to prevent irritationPruning
- Remove dead, damaged, or crossing branches in late winter to early spring before new growth emerges
- Thin crowded inner branches to improve air circulation and sunlight penetration
- Trim low-hanging limbs to clear walkways or structures as needed; avoid heavy pruning that disrupts the tree’s natural canopy shape
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Toxic; tannins may cause vomiting, diarrhea, and abdominal pain
Humans: Contains tannins; large ingestion of acorns or leaves may cause mild gastrointestinal irritation
Garden Uses & Culture
Culture: Symbolizes strength and longevity in southwestern US regional landscapes
Usage: Shade tree for residential yards; provides wildlife habitat for birds and small mammals
