What: Physocarpus opulifolius “Center Glow” is commonly called ninebark. It gets this common name for the attractive, exfoliating bark. Unique foliage color and a rugged disposition are the hallmark of this superior shrub. The spring leaves have centers of golden green, orange and copper tones that are surrounded by dark red-purple, with the hub morphing into shades of red as summer takes over. This cultivar is more compact in growth habit than the species, but just as adaptable to various growing conditions. White flushed pink flowers are produced in clusters during late spring and, although hidden during the growing season, the exfoliating bark exposes beautiful colors of light brown to red brown, debuts in autumn and is attractive throughout winter.