This species has been confused with Fraxinus sieboldiana Blume in the past[].

Common Name:

General Information

Fraxinus longicuspis is a deciduous tree that can grow up to 25 metres tall[, ].
The plant is harvested from the wild for local use as a medicine and ink.
Fraxinus longicuspis is widespread across Japan and there are no reported threats to the population. The species is found within protected areas and ex situ collections. The plant is classified as 'Least Concern' in the IUCN Red List of Threatened Species(2013)[].

Known Hazards

None known

Botanical References

, ,

Range

E. Asia - central and southern Japan

Habitat

A canopy tree in deciduous forests in mountains; at elevations from 100 - 1,100 metres[, ].

Properties

Conservation Status	Least Concern
Medicinal Rating
Other Uses Rating
Habit	Deciduous Tree
Height	15.00 m
Pollinators	Wind
Cultivation Status	Wild

Cultivation Details

Fraxinus longicuspis is a moderately cold-hardy plant, able to tolerate temperatures down to around -20°c when fully dormant[].
Prefers a deep loamy soil, even if it is on the heavy side[, ]. Most members of this genus are gross feeders and require a rich soil[, ]. Plants succeed when growing in exposed positions[] and also in alkaline soils[]. They tolerate atmospheric pollution[].
This species is closely related to Fraxinus chinensis[].
This species might be dioecious, in which case male and female plants must be grown if seed is required.

Edible Uses

None known

Medicinal

Astringent. A tonic for the genito-urinary system[].

Agroforestry Uses:

Fraxinus species in general are gross feeders with an extensive, fibrous root system, which makes transplanting easy, but means that other species will often not grow well if planted nearby, especially if they are shallow rooted[],

Other Uses

A bluish indelible dye is produced by steeping the bark in water[].

The following report was listed under Fraxinus siebolidian. However, it might refer to Fraxinus longicuspis, a distinct species that has in the past been confused with Fraxinus sieboldiana[].
The wood is soft, light and elastic. It is used for making furniture, utensils, baseball bats, tennis rackets etc[, ]. Thin strips of the wood are used to give an ornately grained veneer[].

Propagation

The seed is best harvested green - as soon as it is fully developed but before it has fully dried on the tree - and can then be sown immediately in a cold frame[]. It usually germinates in the spring[]. Stored seed requires a period of cold stratification and is best sown as soon as possible in a cold frame[]. Prick out the seedlings into individual pots when they are large enough to handle and grow them on in a cold frame for their first winter. Plant them out into their permanent positions or a nursery bed in late spring or early summer of the following year.
If you have sufficient seed then it is possible to sow it directly into an outdoor seedbed, preferably in the autumn. Grow the seedlings on in the seedbed for 2 years before transplanting either to their permanent positions or to nursery beds.