Herbaceous Tiarella wherryi [Foamflower] Tiarella wherryi is a clump-forming herbaceous perennial that grows about half a foot tall and can spread up to 20 inches. The white flowers reach heights of up to 20 inches. The leaves are green and lobe shaped. Tiarella wherryi prefers moist soils but dislikes wet feet, so plant accordingly. Tiarella wherryi also does not tolerate full sun.
