Physocarpus opulifolius ‘Diabolo’ – Purple Ninebark
Habit: Shrub, 2-3 m tall and wide, strong-growing.
Flowers: Creamy white umbels, 5 cm wide, forming fascinating contrast to the dark foliage, May to June.
Leaves: Alternate, three to five lobes, dark crimson red, good effect from distance, autumn colour red-brown, orange to brown-yellow.
Soil: Sunny site promotes pronounced red colouring.
Other: See P. opulifolius.
Hardiness: Zone 4.