Spiraea japonica 39green and gold39 produces a profusion of flowers from mid to late summer set against a backdrop of yellow45green foliage japanese spireas are robust deciduous shrubs that deserve a place in every garden adored by butterflies and pollinating insects theyre an excellent choice for the wildlife garden and their vibrant autumn foliage adds a splash of late season colour tough resilient and easy to grow green and gold is a superb low maintenance shrub height an