Valley oak (Quercus lobata)

Valley oak

Also known as: California white oak

Valley oak (Quercus lobata) is a tree endemic to the valleys and foothills of California in the United States. Valley oak is used in limited amounts as a commercial wood in cabinets and wine barrels. The acorns are edible and were historically consumed by indigenous peoples of North America.

Scientific classification

Species

Valley oak (Quercus lobata)

Beeches, walnuts, and allied trees

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Toxic to Humans

Toxicity

Perennial

Lifespan

Tree

Plant Type

Spring

Bloom Time

Fall

Harvest Time

15 m to 21 m

Plant Height

9 m to 15 m

Spread

Green

Leaf Color

2.5 cm

Flower Size

Deciduous

Leaf type

10 - 35 ℃

Ideal Temperature

Images of Valley oak

Attributes of Valley oak

Growth Rate

In the active growing seasons of Spring and Summer, valley oak demonstrates a rapid growth pattern, significantly advancing in both height and foliage density. This accelerated pace leads to prolific leaf production, making the plant notably robust and comprising a substantial canopy. During the off seasons, its growth rate may slow considerably, but Spring and Summer bring a remarkable expansion. These growth dynamics contribute to valley oak's dominant presence in its native habitats, asserting a towering height and impressive breadth each year.

Culture

Garden Use

Valley oak proliferates to a large size, making it a valuable tree for creating woodland garden canopies. The drooping branch structure of older trees adds elegant visual interest to the landscape, and this tree also is resistant to wildfire damage, making it a sensible choice for fire-prone areas. In addition, many animals and birds seek out the abundant crops of acorns produced in the fall.

Symbolism

Protection, Health, Money

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Toxicity

The valley oak tree contains tannins in its leaves and seeds, causing digestive issues if ingested by children, leading to symptoms like nausea and cramping. Cats and dogs consuming large amounts may experience gastrointestinal upset. Prompt veterinary care is essential to address poisoning symptoms.

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Quickly Identify Valley oak

Massive trunk up to 10 feet (3 meters) in diameter.

Male catkins 2-4 inches (5-10 cm), yellowish-green; female flowers tiny.

Distinctive acorn cap with warty scales, 2.5-5 cm (1-2 inches) long.

Leaves 2-4 inches (5-10 cm) long, green with fuzzy-haired undersides, aromatic when crushed.

Yellowish-grey twigs with pale brown, ovoid buds 1-2 inches (2.5-5 cm) long.

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Care Guide for Valley oak

Every 3 weeks

Water

Full sun

Sunlight

10 - 35 ℃

Ideal Temperature

Water: Valley oak is a deciduous oak native to California's Mediterranean climate, thriving in deep, well-drained soils. It shows high drought tolerance and requires water approximately every three weeks. Seasonal rainfall supports its growth, reducing the need for irrigation once established.

Fertilize: Valley oak thrives with balanced nutrition through fertilization in early growth and rapid development phases. Use high nitrogen fertilizers in spring and moderate applications annually or biennially. Avoid late-season fertilization to prevent frost damage, and apply fertilizers around the drip line for optimal nutrient access.

Pruning: Valley oak is a deciduous tree recognized for its broad canopy and durability. Prune in early spring, removing dead or crossing branches to improve circulation. Crown thinning aids light access, but avoid aggressive pruning to maintain health and vitality. Regular care ensures an appealing tree.

Propagation: Valley oak propagates effectively in Autumn and Winter through hardwood cuttings, layering, and seed sowing. It has moderate propagation difficulty, with success indicated by new root and shoot growth. Using healthy, disease-free stock plants enhances propagation success.

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Images of Valley oak

Attributes of Valley oak

Culture

Toxicity

Quickly Identify Valley oak

Care Guide for Valley oak

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