Acer sieboldianum Karhula

Acer sieboldianum Karhula

Siebold’s Maple, Japanese kohauchiwakaede

We collected seed for the dozen seedlings we now have, during the Autumn 2007 on our way to KK. They wintergerminated outside happily.

Family: Aceraceae (ay-ser-AY-see-ee)
Genus: Acer (AY-ser)
Species: sieboldianum


10–15 m

The young shoots are green to red, thinly covered with white hairs in their first year.

Sun Exposure:
Full Sun
Sun to Partial Shade

Bloom Color:
Pale Yellow

Bloom Time:
Late Spring/Early Summer


Other details:
The smooth bark and yellow flowers help distinguish it from the closely related Acer japonicum, which has rough, scaly bark, and red flowers, while the hairy stems and yellow flowers distinguish it from Acer shirasawanum, with hairless stems and red flowers.

Soil pH requirements:
4.5 or below (very acidic)
4.6 to 5.0 (highly acidic)
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)

Propagation Methods:
From hardwood cuttings
From seed; direct sow outdoors in fall
From seed; stratify if sowing indoors
From seed; sow indoors before last frost
From seed; direct sow after last frost

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds

About the Author


Maria is currently growing everything from seed that she can lay her hands on. Also playing with colours and textures to fulfill her garden desires...