Green Gem Boxwood. A great little hybrid Boxwood that requires very little trimming / pruning to maintain a perfect little round ball of tight, dark green foliage. Has shown to hold excellent green color through the winter with excellent hardiness as well. If you want a small, compact, low-growing shrub to form a hedge that serves as an accent or border along your walkway, fence line or planting beds, dwarf boxwood varieties are the best pick.