Oyama magnolia (Magnolia sieboldii)

Oyama magnolia

Also known as: Korean mountain magnolia

Oyama magnolia (Magnolia sieboldii) is a superb, handsome ornamental shrub that's frequently grown in gardens and public spaces for its elegant flowers that have an alluring fragrance. The foliage is no less attractive – it gives a spectacular autumn interest when becomes golden yellow. It's an easy-care shrub with numerous cultivars available.

Scientific classification

Species

Oyama magnolia (Magnolia sieboldii)

Magnolias, nutmegs, and allies

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Perennial

Lifespan

Tree, Shrub

Plant Type

Spring, Summer, Fall

Bloom Time

Fall

Harvest Time

5 m to 10 m

Plant Height

3 m to 4.5 m

Spread

Green

Leaf Color

7 cm to 10 cm

Flower Size

Red, Burgundy, Pink

Fruit Color

White, Red

Flower Color

Images of Oyama magnolia

Distribution of Oyama magnolia

Distribution Map

Oyama magnolia is a plant species indigenous to temperate regions of East Asia. It has been cultivated in various temperate areas across the globe, extending its presence beyond its natural range. The cultivation has led to oyama magnolia's introduction to many botanical gardens and arboreta, enabling the species to thrive in non-native environments while conserving its heritage.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Among shrubbery

Hemisphere Trend Curve

Northern

Sorthern

Quickly Identify Oyama magnolia

Distinct nodding white flowers with crimson stamens, up to 4 inches (10 cm) across.

Pink-hued oval fruits, up to 3 inches (7.5 cm), revealing seeds in orange to red.

Large bell-shaped creamy-white flowers, 3-4 inches (7.6-10 cm) in diameter.

Elongated fruit with rich carmine exterior, revealing vibrant scarlet seeds, 2-3 inches (5-7.6 cm) long.

Leaves turning golden yellow in fall, broad elliptic to oblong, 3-6 inches (7.5-15 cm) long.

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Care Guide for Oyama magnolia

Every 3 weeks

Water

Partial sun

Sunlight

10 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Oyama magnolia originates from East Asian woodlands, thriving in moist, well-drained soil. It prefers even moisture but can withstand short dry spells. Water every three weeks and use mulch to retain soil moisture, mimicking its native habitat's conditions.

Fertilize: For oyama magnolia, use a balanced 10-10-10 fertilizer in spring, applying one handful per mature shrub. Monthly liquid feeds during active growth are beneficial but reduce in fall. Avoid late-season fertilization to prevent frost damage. Annually mulch with compost for gradual soil enrichment.

Pruning: Oyama magnolia thrives with strategic pruning in early spring, targeting dead or crossing branches for air circulation. Regularly trimming weak wood enhances structure and vigor. Avoid heavy pruning, as oyama magnolia blooms on old wood, ensuring a robust plant filled with abundant flowers.

Propagation: Oyama magnolia is a deciduous shrub prized for its fragrant flowers. Propagate via semi-hardwood cuttings (4-6 inches) taken in summer, dipped in rooting hormone, and planted in moist, well-draining soil until roots form. With care, new specimens can flourish in gardens.

Repotting: Not suitable for potting. Oyama magnolia requires specific conditions for optimal growth and is best maintained in its natural habitat.

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