This shrub does best in full sun to partial shade. It prefers to grow in average to moist conditions, and shouldn't be allowed to dry out. Japanese Boxwoods grow to be anywhere from 4 to 8 feet tall. Boxwood foliage grows with many small, oval leaves lining small grey-brown twigs. You can tell them apart from other Boxwood varieties as their leaves are slightly larger and a brighter green. The leaves are leathery and have no change in Fall or Winter.