'Seafoam' is a textural dream come true, and makes 'Silvermound' look, well, pedestrian. It has an abundance of frothy, curled silver foliage that grows in a compact mound about 8 inches tall and 24 inches wide. It will will occasionally bloom with attractive silver and yellow flower spikes. The perennial is less branched, with individual stems being more distinct, giving it a sort of sea-creature appearance.
Grow in full sun and well drained soil. Tolerates poorer, dry soils, though will grow in clay soils if well drained. Cut back in the late spring to early fall to very near the ground. Avoid over watering, or over-head watering as that will cause the foliage to melt out in the center.