Related Terms. 1  operating system virtualization. 2  mobile operating system (OS). 3  OS-operating system. 4  server operating system. 5  system. 6  Microsoft Windows XP operating system. 7  Linux OS (Operating System). 8  paravirtualized operating system. 9  NOS-network operating system. 10  Chrome OS.
Plant evergreen ornamental varieties for year-round specimen plants. Grasses include blue oat grass (Helictotrichon sempervirens) and tall blue fescue (Festuca amethystine). Blue oat grass is a semi-evergreen fountain grass. It grows well in zones 4 through 9 and needs dry, well-drained soil.
Overgrown Evergreens. Arborvitae/White Cedar (Thuja) Youll be hard pressed to find a selection of our native arborvitae that matures in that ideal range of three to four feet tall and wide for an evergreen shrub. However, several of the larger varieties have potential as moderately-sized screening plants.