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Magnolia sieboldii (Oyama Magnolia)

Oyama Magnolia, Korean Mountain Magnolia, Siebold's Magnolia

Magnolia sieboldii, Oyama Magnolia, Korean Mountain Magnolia, Siebold's Magnolia, White magnolia, White flowers, Fragrant Flowers
Magnolia sieboldii, Oyama Magnolia, Korean Mountain Magnolia, Siebold's Magnolia, White magnolia, White flowers, Fragrant Flowers

A classic beauty, Magnolia sieboldii (Oyama Magnolia) is a vase-shaped, deciduous shrub or small tree boasting splendid flowers in late spring to early summer and sporadically throughout the rest of the summer. Emerging from egg-shaped buds, nodding or pendent, cup-shaped fragrant white flowers, 4 in. across (10 cm), with prominent crimson stamens, can be admired. They are followed by showy, pink oval fruits, 3 in. long (7 cm), which split open in the fall to reveal orange to red seeds. The foliage of broad elliptic green leaves, 3-6 in. long (7-15 cm), turns golden yellow in fall. Oyama Magnolia grows as an understory tree or large shrub in the wild. Small-statured, with no serious disease or insect problems, this Magnolia is a good choice for small gardens where it will make a charming statement growing as a central feature.

  • Grows up to 10-15 ft. tall and wide (300-450 cm).
  • Performs best in part shade in moisture-retentive, organically rich, well-drained neutral to acid soil. It may be grown in full sun in cool summer areas as long as the soil is constantly moist. Intolerant of poor soils. Plant in an area protected from strong winds to help the flowers last their longest.
  • A beautiful addition to city gardens, cottage gardens, woodland gardens, patio containers, and small gardens.
  • No serious pest or disease issues. Keep an eye out for capsid bugs, snails, coral spots, gray mold, and honey fungus.
  • Pruning is best done after flowering when in full leaf.
  • Propagate by seed, semi-hardwood, and softwood cuttings.
  • Native to Japan, southeastern China, and Korea.

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Requirements

Hardiness 6 - 9
Heat Zones 6 - 9
Climate Zones 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Shrubs, Trees
Plant Family Magnoliaceae
Genus Magnolia
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)
Summer (Early, Mid)
Fall
Height 10' - 15'
(3m - 4m)
Spread 10' - 15'
(3m - 4m)
Maintenance Average
Water Needs Average
Soil Type Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Cut Flowers, Fragrant, Showy, Fruit & Berries
Garden Uses Patio And Containers, Small Gardens
Garden Styles City and Courtyard, Informal and Cottage
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Alternative Plants to Consider

Magnolia tripetala, Umbrella Tree, Umbrella Magnolia, Magnolia virginiana var. tripetala
Magnolia grandiflora 'Little Gem', Southern Magnolia 'Little Gem', Evergreen Magnolia 'Little Gem', Loblolly Magnolia 'Little Gem', Great Laurel Magnolia 'Little Gem', Big Laurel 'Little Gem', Bull Bay 'Little Gem'
Magnolia grandiflora 'Exmouth', Southern Magnolia 'Exmouth', Evergreen Magnolia 'Exmouth', Loblolly Magnolia 'Exmouth', Great Laurel Magnolia 'Exmouth', Big Laurel 'Exmouth', Bull Bay 'Exmouth'
Magnolia grandiflora, Southern Magnolia, Evergreen Magnolia, Loblolly Magnolia, Great Laurel Magnolia, Big Laurel, Bull Bay
Magnolia grandiflora 'Kay Parris', Southern Magnolia 'Kay Parris', Evergreen Magnolia 'Kay Parris', Loblolly Magnolia 'Kay Parris', Great Laurel Magnolia 'Kay Parris', Big Laurel 'Kay Parris', Bull Bay 'Kay Parris'AGM Award
Magnolia macrophylla, Bigleaf Magnolia, Large-Leaved Cucumber Tree, Umbrella Tree

Recommended Companion Plants

Enkianthus Campanulatus, Redvein Enkianthus, Furin-Tsutsuji, deciduous shrubAGM Award
Mahonia nervosa, Cascade Barberry, Cascade Oregon-Grape, Dwarf Oregon-Grape, Berberis nervosa, Yellow Flowers, Blue Berries, evergreen shrub
Carex morrowii 'Variegata', Sedge 'Variegata', Japanese Sedge 'Variegata', Morrow's Sedge 'Variegata', Variegated Sedge, Ornamental grasses,
Dicentra Spectabilis 'Gold Heart',Bleeding Heart 'Gold Heart', Dutchman's Breeches 'Gold Heart', Chinaman's Breeches 'Gold Heart', Locks and Keys 'Gold Heart', Lyre Flower 'Gold Heart', Seal Flower 'Gold Heart', Lamprocapnos Spectabilis 'Gold Heart', Shade perennial
Hakonechloa Macra Aureola, Hakone Grass 'Aureola', Japanese Forest Grass 'Aureola', Shade grasses, Aureola Grass, part shade grass, full shade grass, Japanese grass, Golden Japanese Forest GrassAGM Award
Hosta June, Variegated Plantain lily, Plantain Lily 'June', Shade perennials, Plants for shadeAGM Award
Polygonatum Odoratum 'Variegatum', Solomon's Seal Variegatum, Polygonatum multiflorum Variegatum, Polygonatum odoratum 'Grace Barker', Polygonatum × hybridum 'Variegatum', Polygonatum × hybridum 'Striatum', shade perennials, wet soil perennialsAward General
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
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Requirements

Hardiness 6 - 9
Heat Zones 6 - 9
Climate Zones 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Shrubs, Trees
Plant Family Magnoliaceae
Genus Magnolia
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)
Summer (Early, Mid)
Fall
Height 10' - 15'
(3m - 4m)
Spread 10' - 15'
(3m - 4m)
Maintenance Average
Water Needs Average
Soil Type Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Cut Flowers, Fragrant, Showy, Fruit & Berries
Garden Uses Patio And Containers, Small Gardens
Garden Styles City and Courtyard, Informal and Cottage
How Many Plants
Do I Need?
Learn Now
Guides with
Magnolia
Not sure which Magnolia to pick?
Compare Now

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