Genus Physocarpus Species opulifolius Cultivar 'Monlo' DiaboloÂ® Common Name DiaboloÂ® Ninebark Patent ID pp# 11211 Height 10 to 12 Feet Spread 8 to 10 Feet Habit Upright with arching branches. Moderate growth rate. Zone 2 to 8 Culture Full sun. Flower Pinkish-white flower clusters. May-June. Flower Color White Foliage Purplish red lobed foliage. May become dark green in extreme heat or shade. Deciduous. Category: Flowering Tree Description Ours are single-stemmed, tree form plants! Awesome!