Magnolia Species, Korean Mountain Magnolia, Oyama Magnolia, Siebold's Magnolia

Magnoliasieboldii

Genus
Magnolia (mag-NO-lee-a)
Species
sieboldii (see-BOLD-ee-eye)
Synonym
Magnolia parviflora f. variegata
Sun Exposure
Full Sun
Foliage
Deciduous
Smooth
Height
12-15 ft. (3.6-4.7 m)
Spacing
6-8 ft. (1.8-2.4 m)
Hardiness
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)
Danger
N/A
Bloom Color
White/Near White
Bloom Time
Late Spring/Early Summer
Other Details
Category
Shrubs
Trees
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
Flowers are fragrant
Bloom Size
Other details
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
Non-patented
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
Regional

This plant is said to grow outdoors 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

Easley, South Carolina

Lexington, Virginia

Blaine, Washington

Shoreline, Washington

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Gardener's Notes:

2
positives
2
neutrals
0
negative
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B
Easley, SC | November 2018 | neutral

A bit hard to grow in the Deep South. A selection Magnolia sieboldii 'Colossus' has been successfully growing for me for over ten years ...Read More

J
Saint Paul, MN | May 2008 | positive

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. ...Read More

P
P
Baltimore, MD | April 2006 | neutral

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 we...Read More

T
St. John's, NL (Zone 5b) | September 2004 | positive

The advantage of this magnolia is the fact that it blooms well after the leaves are unfurled, therefore no risk of late frosts spoiling t...Read More

Featured
Syrphid Fly
(Helophilus fasciatus)
Song Thrush
(Turdus philomelos)
Featured
Syrphid Fly
(Helophilus fasciatus)
Song Thrush
(Turdus philomelos)