Interior live oak (Quercus wislizeni) is an evergreen perennial tree that will grow from 10 to 22 m tall. Commonly found growing in harsh sites in the western United States that other oaks cannot tolerate. It has dark green leaves and male and female flowers on the same tree. Male flowers are catkins that turn brown as they mature. Deer browse the foliage, while squirrels and birds feed on the acorns.
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Toxic to Humans
Toxicity
Perennial
Lifespan
Tree
Plant Type
Spring
Bloom Time
8 m to 24 m
Plant Height
11 m
Spread
10 - 35 ℃
Ideal Temperature
On This Page
Images
Culture
Toxicity
Care Guide
FAQs
Common Diseases
Images of Interior live oak
Culture
Symbolism
Protection, Health, Money
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Toxicity
Interior live oak is poisonous if ingested. Side effects include abdominal pain, nausea, vomiting, and can be fatal for small children. Cats and dogs may exhibit gastrointestinal issues if they consume large quantities of leaves or seeds. Immediate professional veterinary care is crucial if poisoning is suspected to ensure pet safety. The leaves, bark, and acorns are safe to touch.
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Water:
Interior live oak flourishes in dry habitats, showcasing high drought tolerance. Watering every 2-3 weeks suffices. Best grown outdoors, it requires well-draining soil to avoid root rot, demonstrating adaptability to varying climates.
Fertilize:
To care for interior live oak, apply balanced or high nitrogen fertilizers annually in spring, following manufacturer guidelines. Nutrient needs vary seasonally; reduce during dormancy. Fertilize around the drip line, water thoroughly afterward, and wear gloves for safe handling.
Pruning:
Interior live oak flourishes with early to late winter pruning, focusing on removing dead branches and thinning foliage for better airflow. Avoid heavy pruning during spring and summer to reduce stress. Clean, sharp tools ensure precise cuts, promoting plant health and minimizing disease risk.
Propagation:
Propagation of interior live oak uses fresh acorns collected from mature trees. Planting soon after collection is vital due to quick loss of viability. A cold stratification process enhances germination rates. Acorns should be sown in well-drained soil at a shallow depth, kept moist but not waterlogged.
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