Physocarpus opulifolius 'Diabolo'
'Diabolo' is a deciduous shrub with deep red leaves, you could call the purple in some lights. They have three-lobed leaves that are brilliant to contrast against your other plants. The flowers have clusters of small white, pink-tinged flowers in summer.
DFG rating: 9/10
RHS pruning group: 2
Leaves: Deciduous and dark red.
Flowers: White to creamy white.
Soil Ph: Lightly Acidic.