Threadleaf Maple Acer palmatum subsp. matsumurae

The Japanese laceleaf maple is a short tree in the maple family (Sapindaceae), native to southeast Korea and central and south Japan, and noted for having many aesthetically pleasing forms. Weeping as well as upright varieties exist, and the species is well noted for its beautiful deep red and orange summer color that deepens into the fall. Acer is Latin for sharp and palmatum means shaped like a hand, referring to the leaves.

Japanese laceleaf maple is an attractive deciduous shrub or small tree with a low spreading shape and distinctly divided lacy leaves.  The size and leaf colors vary greatly with cultivars.

This tree prefers moist, organically rich, slightly acidic, well-drained soils and grows well in sandy loams. Plant it in full sun to partial shade but where it will get some afternoon shade. Makes a good dappled shade understory plant.  

New foliage may scorch in full sun locations in hot summer areas, particularly if soils are not kept consistently moist. Mulch helps retain soil moisture and keep roots cool. Avoid hot and dry sites and protect from strong winds. Pruning is best kept to a minimum, but if needed should be done in late fall to mid-winter. Spring or summer pruning often results in significant bleeding.  

It works well as a specimen plant near a patio or entryway or planted in groups on the outskirts of a landscape or rock garden.

Insects, Diseases, and Other Plant Problems: Aphids, scale, maple worms, leafrollers, and leafhoppers are occasional pests. Anthracnose, leaf scorch, and frost damage, especially from late frosts, can occur.  It self-seeds easily so can spread and become weedy in the landscape. High pH soils cause chlorosis. See potential insect and disease problem fact sheets to the left.

The Clemson Cooperative Extension Home and Garden Information Center has a factsheet on common maple diseases and insect pests.

VIDEO created by Andy Pulte for “Landscape Plant Identification, Taxonomy and Morphology” a plant identification course offered by the Department of Plant Sciences, University of Tennessee.

More information on Acer palmatum.