The Dwarf Japanese Garden Juniper 'Nana' is an evergreen ground cover conifer that reaches about 6" high and 5-6' wide at maturity.  Nana is seen often in our zone since it forms a dense compact mat with branches that tend to intertwine and spread out in sprays of limbs. The leaves are prickly needles that are bluish-green. It's a great ground cover for areas that don't have great soil, water and hot sun. It grows a little slow but we like it because it's not invasive like some other ground covers.