USDA Zone 4: Conifers

Arborvitae, Eastern (Thuja occidentalis)
Cypress, bald (Taxodium distichum), deciduous conifer
Falsecypress, Sawara or Japanese (Chamaecyparis pisifera)
Falsecypress, Whitecedar (Chamaecyparis thyoides)
Fir, Douglas (Pseudotsuga menziesii)
Fir, fraser or southern balsam (Abies fraseri)
Fir, Nordmann (Abies nordmanniana)
Fir, veitch (Abies veitchii)
Fir, white (Abies concolor)
Hemlock, Canadian or Eastern (Tsuga canadensis)
Juniper, Chinese (Juniperus chinensis), specific cultivars
Common juniper (Juniperus communis)
Juniper, creeping (Juniperus horizontalis)
Juniper, japgarden (Juniperus procumbens)
Juniper, Rocky Mountain, also called Colorado redcedar (Juniperus scopulorum)
Juniper, singleseed or flaky (Juniperus squamata)
Juniper, savin (Juniperus sabina)
Pine, Austrian (Pinus nigra)
Pine, Eastern white (Pinus strobus)
Pine, Japanese red pine (Pinus densiflora)
Pine, Japanese umbrella (Sciadopitys verticillata)
Pine, mugo (Pinus mugo)
Pine, ponderosa (Pinus ponderosa)
Pine, red (Pinus resinosa)
Redcedar, Eastern (Juniperus virginiana)
Redwood, dawn (Metasequoia glyptostroboides) (deciduous conifer), in protected sites
Spruce, bird's nest (Picea abies 'Nidiformis')
Spruce, Colorado (Picea pungens)
Spruce, Norway (Picea abies)
Yew, Anglojap (Taxus x media)
Yew, Canadian (Taxus canadensis)