Salvia nemorosa White Mound is a small dense rounded shrub to 30cm x 50cm . Massed spikes of white flowers in spring. Dead head plant and it will flower again in autumn. Most well drained soils in full sun. Prune back hard at the end of Autumn. Ideal for containers, massed plantings and borders. We have Salvia nemorosa growing all over the garden, from dry areas with no supplemental water to areas with summer water.