Larix Species, Japanese Larch, Karamatsu

Larixkaempferi

Family
Pinaceae (py-NAY-see-ee)
Genus
Larix (LAR-iks)
Species
kaempferi (KAYMP-fer-ee)
Synonym
Larix leptolepis
Sun Exposure
Full Sun
Foliage
Deciduous
Height
over 40 ft. (12 m)
Spacing
30-40 ft. (9-12 m)
over 40 ft. (12 m)
Hardiness
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
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)
Danger
Handling plant may cause skin irritation or allergic reaction
Bloom Color
Inconspicuous/none
Bloom Time
Late Winter/Early Spring
Mid Spring
Other Details
Category
Trees
Conifers
Water Requirements
Requires consistently moist soil; do not let dry out between waterings
Foliage Color
Where to Grow
Can be grown as an annual
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
Patent Information
Non-patented
Propagation Methods
From softwood cuttings
From semi-hardwood cuttings
From seed; sow indoors before last frost
From seed; direct sow after last frost
Seed Collecting
Properly cleaned, seed can be successfully stored
Regional

This plant is said to grow outdoors in the following regions:

Colebrook, Connecticut

Lisle, Illinois

Ferrysburg, Michigan

Duluth, Minnesota

Maryville, Missouri

North Platte, Nebraska

Portland, Oregon

Aspers, Pennsylvania

Blairsville, Pennsylvania

Media, Pennsylvania

Marlinton, West Virginia

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Gardener's Notes:

5
positives
2
neutrals
0
negative
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H
Chicago, IL (Zone 5a) | July 2019 | positive

Timberplot, you can interplant larch with white pine to protect your pines from the weevil. They (the weevil) need a pine tip image again...Read More

I
Carbondale, IL | March 2018 | neutral

I got some bare root and set some of them out because I didn't want to pot them all and they died in a heavy clay. The potted ones thrive...Read More

T
Blairsville, PA | July 2016 | positive

The Japanese Larch has established well on abandoned and reclaimed coal mining lands in Western and Southwestern PA. The yellow, golden f...Read More

R
Downingtown, PA | December 2013 | positive

Japanese Larch is a handsome deciduous conifer, not very different from the European species that is more commonly planted in the Midwest...Read More

W
Eastern Long Island, NY (Zone 7a) | December 2007 | positive

Showy in the spring but tends to become unruly towards late summer.
Will not tolerate pruning out of season. I found that if I ...Read More

S
Oklahoma City, OK (Zone 7a) | January 2005 | positive

Excellent bonsai specimen. Bark is a lovely rust color and peels beautifully. Branches arch slightly downward. Fantastic form.

S
Oklahoma City, OK (Zone 7a) | January 2005 | neutral

Nice tree for bonsai. Does not tolerate standing water, but likes moist soil. Seed can be gathered from cones which ripen in late autum...Read More

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