then use an under-planting with plants with purple or dark green foliage or purple flowers

30 - 32 Inches 76cm - 81cm

dwarf plant displaying red petaled flowers with golden centres all summer long

A low spreading sedum with strikingly  variegated leaves

Spread: 18-24 in

Astilbe 'Mojito' Boughs then use an under-planting withDense, plume like spikes of off white flowers, open in late spring above attractive, mounding green plants. The foliage gradually takes on a bronze cast. Astilbe thrive in part sun to full shade and moist, rich, well drained soils that do not dry out. Early flowering. SUN EXPOSURE: Part Sun Shade BLOOM TIME: Summer AVERAGE SIZE: 20 24" x 18 24" (51 60cm x 45 60cm) COLD HARDINESS: 30F to 20F 34C 29C (USDA Zone 4)