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Magnolia sieboldii

Korean Mountain Magnolia · Oyama Magnolia

Family MagnoliaceaeGenus Magnolia

A white cupped flower opening to show crimson stamens
FlowerSten PorseCC BY-SA 3.0

About the plant

What it is and where it grows — not part of any germination protocol.

The plant

Habit
Deciduous shrubPlant Finder
Habit
shrub or treePlants of the World Online
Height
10-15 ft3-4.6 mPlant Finder
Spread
10-15 ft3-4.6 mPlant Finder
Flower
Showy; white with crimson stamensPlant Finder
Blooms
May to JulyPlant Finder
Native range
China, Japan, KoreaPlant Finder
Hardiness zones
6-8Plant Finder
Note
Germination is epigeal; cotyledons follow in 1-3 weeks. Empty seed coats skew Deno's counts.Seed Germination Theory and Practice, 2nd ed.

Growing conditions

Sun
Full sun to part shadePlant Finder
Soil
Moist, fertile, slightly acidic, organically rich, well-drained loamPlant Finder
Soil pH
Acid (<6.0), Alkaline (>8.0), Neutral (6.0-8.0)Extension Gardener Plant Toolbox
Moisture
Good Drainage, MoistExtension Gardener Plant Toolbox
Watering
MediumPlant Finder

Toxicity is noted only where a source states it. No note here is not a finding of safety.

Sources: Plant Finder — Missouri Botanical Garden; Plants of the World Online — Royal Botanic Gardens, Kew; Extension Gardener Plant Toolbox — NC State Extension; Seed Germination Theory and Practice, 2nd ed. — N. C. Deno.

Worth knowing

  • The national flower of North Korea, where it is called mongnan. Named for the German doctor Philipp Franz von Siebold, it is one of the hardiest magnolias. Wikipedia: Magnolia sieboldii

This source reports three treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

  1. Clean the flesh off the seed

    The seed sits in an oily red berry. Wash it daily, briefly, with detergent.

  2. Sow and cover

No stated waiting before sowing.

Deno gives no figures in this passage -- only the washing, and the two things that kill the seed.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, MagnoliaPublic domain
Show the original text
Magnolia (Magnoliaceae). Seeds are enclosed in an oily red berry, and were WC with daily brief detergent washes. Germinations might have been improved if there had been exteneded detergent washes. Empty seed coats make seed counts inaccurate. Germination is epigeal and the cotyledons develop in 1-3 w after germination. Outdoor treatment killed the seeds and seeds of M. sieboldi and M. wilsoni that had been stored for 2 y were dead.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Magnolia. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.

Protocol 2

DerivedN. C. Deno, 1993

  1. Dry storage

    Duration: 730 days

    Seed stored two years was dead.

  2. Sow and cover

about 2 years from start to sowing.

0% germination.

Two years in storage and the seed was simply dead. Sow Magnolia fresh.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, MagnoliaPublic domain
Show the original text
Magnolia (Magnoliaceae). Seeds are enclosed in an oily red berry, and were WC with daily brief detergent washes. Germinations might have been improved if there had been exteneded detergent washes. Empty seed coats make seed counts inaccurate. Germination is epigeal and the cotyledons develop in 1-3 w after germination. Outdoor treatment killed the seeds and seeds of M. sieboldi and M. wilsoni that had been stored for 2 y were dead.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Magnolia. Quoted exactly. Every value on this card comes from this record; the step names come from a fixed list.

Protocol 3

DerivedN. C. Deno, 1993

  1. Clean the flesh off the seed

    The seed sits in an oily red berry. Wash it daily, briefly, with detergent.

  2. Sow outdoors and leave it

    Outdoor treatment killed the seeds.

No stated waiting before sowing.

0% germination.

Deno reports this for Magnolia as a whole rather than for this species by name.

This source doesn't state how long step 2 lasts.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, MagnoliaPublic domain
Show the original text
Magnolia (Magnoliaceae). Seeds are enclosed in an oily red berry, and were WC with daily brief detergent washes. Germinations might have been improved if there had been exteneded detergent washes. Empty seed coats make seed counts inaccurate. Germination is epigeal and the cotyledons develop in 1-3 w after germination. Outdoor treatment killed the seeds and seeds of M. sieboldi and M. wilsoni that had been stored for 2 y were dead.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Magnolia. Quoted exactly. Every value on this card comes from this record; the step names come from a fixed list.

How each step is done, in Deno’s words, and what Verified and Derived mean.

Germination trials

Readers’ own records of sowing this species, published after review. Share your trial · All trials

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