Photo by Melody

PlantFiles: Oyama Magnolia
Magnolia sieboldii

Family: Magnoliaceae
Genus: Magnolia (mag-NO-lee-a) (Info)
Species: sieboldii (see-BOLD-ee-eye) (Info)

3 vendors have this plant for sale.

7 members have or want this plant for trade.


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6-8 ft. (1.8-2.4 m)

USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Full Sun


Bloom Color:
White/Near White

Bloom Time:
Late Spring/Early Summer


Other details:
Flowers are fragrant
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
5.1 to 5.5 (strongly acidic)
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:

Propagation Methods:
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors

Seed Collecting:
Remove fleshy coating on seeds before storing
Seed does not store well; sow as soon as possible

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By Todd_Boland
Thumbnail #1 of Magnolia sieboldii by Todd_Boland

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There are a total of 13 photos.
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2 positives
1 neutral
No negatives

Gardeners' Notes:

Positive john55121 On May 29, 2008, john55121 from Saint Paul, MN wrote:

There is an 8ft tall specimen in the Minnesota Landscape Arb that has about 30 1" flower buds on it. Lookd healthy with no winterkill. Flower buds to the top.

Neutral pbf377 On Apr 14, 2006, pbf377 from Baltimore, MD wrote:

I am now in the third year of my plant that is now about 4 feet tall. It started as a very small plant (12 inches) and has grown very well, problem is I have yet to see a single bloom. Maybe I have not had it long enough yet....but it is supposed to be a "early" as in young bloomer.

Positive Todd_Boland On Sep 25, 2004, Todd_Boland from St. John's, NL (Zone 5b) wrote:

The advantage of this magnolia is the fact that it blooms well after the leaves are unfurled, therefore no risk of late frosts spoiling the flowers. The blooms are somewhat pendant, about 4-5 inches across and highly fragrant. The red-pink stamens are also very showy. The foliage is much nicer than the spring-blooming magnolias, making it an attractive shrub throughout the entire summer. It is also among the hardiest magnolias, even surviving in zone 4 if sheltered.


This plant has been said to grow in the following regions:

Clermont, Kentucky
Georgetown, Kentucky
Louisville, Kentucky
Baltimore, Maryland
Galesburg, Michigan
, Newfoundland and Labrador
Lake Oswego, Oregon
Lebanon, Oregon
New Hope, Pennsylvania
Lexington, Virginia
Blaine, Washington
Shoreline, Washington

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