Vaccinium oldhamii

Vaccinium oldhamii, or Japanese blueberry, belongs to the heath family, Ericaceae. Its native range covers eastern China, South Korea, and Japan. It grows in Japanese woods and thickets at low mountain elevations. This deciduous shrub has many stems and a broad, rounded form. Its branches spread outward, and it grows at a moderate rate. It can reach 12 feet [3.7 metres] in height.

The green stems have an angular shape and many branches. The thin, green leaves feel like paper. They are oval or broader toward the tip. Their edges may be smooth or toothed. Bristles dot the upper leaf surface. More bristles follow the midrib and veins beneath. Leaves measure about 0.08–0.25 feet [0.025–0.076 metres] long and wide. In autumn, the foliage turns red to burgundy.

White flowers appear in summer and draw pollinators. Their fused petals form small urns that hang downward. Each raceme holds eight to twenty flowers. Small, dark berries follow, with fruit present in summer and autumn. They are smaller and darker than those of other blueberries. The berries measure about 0.02 feet [0.006 metres] across. People can eat them fresh or cook them. Plants For A Future gives their food value two out of five. It lists no known hazards or medicinal uses.

Grow this shrub in moist soil that drains well. It suits soil rich in organic matter, including light loam. It needs acid soil, with a stated pH range of 4.5–6. Lime or high pH can cause yellow leaves through chlorosis. Full sun gives the best fruit crop. The plant also tolerates light or dappled shade. Choose a spot with shelter from strong winds. North Carolina State Extension lists USDA hardiness zones 5–9. The roots dislike disturbance, so choose the final planting site with care. Young plants can stay in pots until that site is ready. Plants For A Future advises growing two plants from different sources for fruit.

Use it in an edible garden, shrub border, or woodland setting. Its spreading form suits hedges, screens, and group plantings. It can also grow in a container or beside a patio. The flowers support pollinators, while autumn leaves add seasonal colour. North Carolina State Extension reports no major pest or disease problems. Soil acidity remains an important part of its care.