The Temperate Database is in the process of being updated, with new records being added and old ones being checked and brought up to date where necessary. This record has not yet been checked and updated.

Common Name:

General Information

Pleioblastus gramineus is an evergreen bamboo that can grow 3 - 5 metres tall; the erect, woody culms are 5 - 20mm in diameter with thin-walled internodes 10 - 25cm long[]. The rhizomes are elongated, the plant having a running habit that can produce new canes some distance from the main clump, especially in warm climates. This tendency to run, however, is somewhat curtailed in cooler climates, where new shoot production can be rather reduced.
The plant is harvested from the wild for local use as a food and source of materials.
The rootstock is running and invasive[]. It is reported as having escaped from cultivation in the Cook Islands and become invasive[].

Known Hazards

None known

Botanical References

, ,

Range

E. Asia - southern Japan (Ryukyu Islands)

Habitat

Not known

Properties

Weed Potential	Yes
Edibility Rating
Other Uses Rating
Habit	Evergreen Bamboo
Height	3.00 m
Pollinators	Wind
Cultivation Status	Wild

Cultivation Details

Pleioblastus gramineus can tolerate temperatures down to below freezing, perhaps to -10°c for short periods.
Succeeds in most soils but prefers a good loamy soil[] in a sheltered position in semi-shade[]. Dislikes drought[]. Requires shelter from cold winds[].
New shoots are produced from late spring[].
This species is notably resistant to honey fungus[].
Bamboos have an interesting method of growth. Each plant produces a number of new stems annually -usually in the spring and early summer, and these stems grow to their maximum height in their first two to three months. Any subsequent growth in the stem is limited to the production of new side branches and leaves.
Temperate bamboo species usually grow for many years without flowering. When they do finally flower it is not unusual for all the plants of that species in the region to also flower. They do so profusely over a period of 1 - 3 years and will often then die, probably from exhaustion. Some species, if given plenty of organic matter at this time will gradually recover, although they will look rather poorly for a year or three. If fed with artificial NPK fertilizers at this time the plants are more likely to die[].

Edible Uses

Young shoots - cooked[, ].

Medicinal

None known

Other Uses

Canes are thin-walled but strong and can be used as plant supports[, ].

Propagation

Seed - if possible, surface sow the seed as soon as it is ripe in a greenhouse at about 20°c. Stored seed should be sown as soon as it is received. Do not allow the compost to dry out. Germination usually takes place fairly quickly so long as the seed is of good quality, though it can take 3 - 6 months. Prick out the seedlings into individual pots when they are large enough to handle and grow them on in a lightly shaded place in the greenhouse or cold frame until they are large enough to plant out, which could be a number of years. The plants only flower at intervals of several years and so seed is rarely available.
Division as the plant comes into growth in spring. Take divisions with at least three canes in the clump, trying to cause as little root disturbance to the main plant as possible. Grow them on in light shade in a greenhouse in pots of a high fertility sandy medium. Mist the foliage regularly until plants are established. Plant them out into their permanent positions when a good root system has developed, which can take a year or more[].