Pleioblastus simonii aka Simon Bamboo

Pleioblastus simonii is an evergreen bamboo in the grass family, Poaceae. Its common names include Simon bamboo and Medake. It comes from central and southern Japan. Its range includes western Honshu, Kyushu and Shikoku. The plant grows upright and forms a dense thicket. It suits hedges, screens and plantings that need a strong outline.

Garden plants reach about 8–13 feet [2.5–4 metres] tall. The RHS also describes plants reaching 15 feet [4.5 metres]. Spread reaches about 5–8 feet [1.5–2.5 metres]. Plants take five to ten years to reach mature size. Olive-green stems carry a thick cover of narrow, linear leaves. These leaves can reach about 1 foot [0.3 metres] long. The foliage stays on the plant through winter.

Grow this bamboo in fertile soil rich in humus. It needs moist soil that drains well. Clay, loam and sand can all suit it. It accepts acid, neutral and alkaline soil. Choose full sun or partial shade. Shelter it from cold winds that dry the leaves. The RHS rates it H5 for UK hardiness. Plants For A Future lists USDA zones 5–9. That source also reports tolerance of coastal exposure.

Its creeping rootstock can spread beyond its intended space. Warm, moist conditions can make this spread invasive. Restrain the roots where space is tight. This warning contrasts with PFAF's listing of no weed potential. Divide plants to raise new ones. In spring, remove dead, weak and damaged stems. Thin crowded growth to reveal the canes. The RHS advises cutting out flowering shoots as they appear. Slugs may cause damage, but disease is seldom a problem.

The thin-walled canes are strong enough for plant supports and fencing. People also use them for fan handles, poles and crafts. Young shoots are edible after cooking, but taste very bitter. Changing the cooking water reduces bitterness, though it removes some nutrients. New shoots measure about 0.8 inches [0.02 metres] across. The seeds are also edible when cooked. Remove their papery husks before eating them. PFAF lists no known hazards and no known medicinal uses. That hazard statement does not establish specific safety for pets.