Photo by Melody

PlantFiles: Oyama Magnolia
Magnolia sieboldii 'Colossus'

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

2 vendors have this plant for sale.

One member has or wants this plant for trade.

Category:
Shrubs
Trees

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)

Sun Exposure:
Full Sun

Danger:
N/A

Bloom Color:
White/Near White

Bloom Time:
Late Spring/Early Summer

Foliage:
Deciduous
Smooth-Textured

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:
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

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By ViburnumValley
Thumbnail #1 of Magnolia sieboldii by ViburnumValley

By ViburnumValley
Thumbnail #2 of Magnolia sieboldii by ViburnumValley

By mcgerm
Thumbnail #3 of Magnolia sieboldii by mcgerm

By mcgerm
Thumbnail #4 of Magnolia sieboldii by mcgerm

By mcgerm
Thumbnail #5 of Magnolia sieboldii by mcgerm

Profile:

1 positive
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive mcgerm On Sep 7, 2011, mcgerm from Galesburg, MI wrote:

Third year in the ground after receiving a 3 ft stick originally. It really took off this year. I have had flowers since early spring, one or two here or there, all summer. I have heard that as it gets bigger it flowers almost daily from spring to fall. I would die for a Southern Magnolia that could grow in MI, but this is an excellent continuous blooming and fragrant replacement for the warmth deprived.

Regional...

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

Shawnee Mission, Kansas
Galesburg, Michigan
Great River, New York
Marion, Ohio
Downingtown, Pennsylvania
Shoreline, Washington



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