Plant Profile: Rubus phoenicolasius

The Rubus genus encompasses blackberries, dewberries, and raspberries, with most species characterized by thorny or bristly stems and compound leaves. Notably, flowers and fruits typically develop on last year's canes rather than new growth, necessitating careful pruning to avoid removing the canes that will produce berries in the following season. There are variations among species; for instance, some grow as upright or arching shrubs reaching heights of up to 8 feet, while others spread along the ground like vines. Dewberries bear fruit in the spring, whereas blackberries and raspberries yield their harvest in the summer. Overall, the Rubus genus includes some of the most vital plants for wildlife in the southeastern United States.

Rubus phoenicolasius, commonly known as Wine raspberry, is recognized as a potentially invasive species and is prohibited in several New England states, though it has not yet been classified as invasive or noxious in North Carolina. Nonetheless, it is known to form dense thickets and can become quite weedy.

Wine raspberry is a perennial, deciduous shrub that can grow up to 9 feet tall and 3 feet 3 inches wide at a moderate growth rate. It flowers from June to July, with seeds maturing into edible fruit between August and September. This species is primarily pollinated by insects and thrives in sandy, loamy, and clay soils, favoring moist, well-drained conditions. It can tolerate semi-shade or full sun but prefers damp soil. Wine raspberry is easily identifiable by its rounded leaflets and bristly stems adorned with red hairs. In its native habitat, it typically grows in clearings at low to medium elevations throughout Japan and China.

The fruit can be consumed raw or cooked and is described as sweet and juicy. While it resembles a raspberry, it is smaller, contains more seeds, and is somewhat less flavorful. Additionally, Wine raspberry can serve as an ornamental plant, with its red stems providing winter garden color. It can be propagated from seeds or through division in early spring.

Regarding plant health, species within this genus are particularly vulnerable to honey fungus.