Pine vs fir vs spruce: how to tell Northwest conifers apart

How to tell pine, fir and spruce apart in 4 questions

This key covers the native conifers you are likely to meet in Washington and Oregon, using the field descriptions in Oregon State University’s Common Trees of the Pacific Northwest. Have a twig in hand, and a cone if one is lying under the tree.

1. Needles or scales?Tiny scale-like leaves that overlap like shingles in flat, fern-like sprays mean a cedar: western redcedar, incense cedar, Port-Orford-cedar or Alaska yellow-cedar. A mix of scales and short needles, with small berry-like cones, means a juniper. Needles: go to question 2.
2. One needle at a time, bundles or tufts?Needles bound together in bundles of 2, 3 or 5 mean a pine. Soft needles in dense tufts of 20 to 40 on short woody spurs, turning yellow and dropping in winter, mean a larch. Needles attached one by one: go to question 3.
3. Is there a woody peg under each needle?Stiff, sharp needles about an inch long, each springing from a tiny woody peg, mean a spruce. Very short needles on small rounded pegs, on a tree with a drooping top, mean a hemlock; western hemlock’s needles come in two distinct lengths. No peg: go to question 4.
4. Check the cone and the bud.Cones standing upright on the topmost branches, rounded buds often coated in resin or wax, and a tiny flat round scar where you pull a needle off mean a true fir. Hanging cones with three-pointed bracts and large pointed buds mean Douglas fir. Pointed needles that are lighter green but not white underneath, and a red berry-like fruit instead of cones, mean Pacific yew.

Two of those steps hold surprises. Douglas fir carries “fir” in its name but sits in its own genus, Pseudotsuga, which is why OSU spells it with a hyphen; and hemlocks have pegs too, small and rounded rather than square. The Washington state tree guide compares western hemlock and Douglas fir side by side.

Pine vs spruce vs fir needles up close

OSU calls the spruce’s woody peg one of the best ways to identify the genus, and the same test, pulling a needle and looking at what is left, sorts out the rest.

Pine vs fir vs spruce at a glance

Read across the row that matches your twig; the look-alikes that are neither pine, fir nor spruce are included.

Source: OSU College of Forestry, Common Trees of the Pacific Northwest (genus and species pages). Checked 2026-10-02.

Which pines, firs and spruces are native to Washington and Oregon?

Oregon has more of them. Several species, such as sugar pine and Brewer spruce, reach the state only in its southern mountains, and OSU notes that Oregon’s six native true firs are more than any other state has. The native-status columns below come from the USDA Forest Service’s tree records; the ranges are OSU’s.

Native status: USDA Forest Service FIADB tree records (nativity and state distribution). Ranges: OSU College of Forestry species pages. Checked 2026-10-02.

Two familiar spruces are missing on purpose. The USDA records list neither blue spruce (Picea pungens) nor Norway spruce (Picea abies) as growing in Washington or Oregon, so one in a yard was planted. The same records list English yew as introduced in Washington; the native yew is Pacific yew. Profiles of the region’s common trees are under Northwest tree species.

Common mix-ups: Douglas fir vs true firs, hemlock vs yew, incense cedar vs redcedar

Douglas fir vs true firs

Look up, then down. True fir cones perch upright on the topmost branches, in OSU’s words “like small owls,” and shed their scales on the tree when the seeds ripen, so whole ones rarely turn up underfoot; Douglas fir cones hang and fall intact. True fir buds are rounded and often coated in resin or wax, Douglas fir buds large and pointed. Young true fir bark carries resin blisters that pop when pressed. At the Christmas tree lot, that is the difference between a noble fir and a Douglas fir; more in noble fir vs Douglas fir.

Hemlock vs Pacific yew

These two get mixed up because both have short needles on slender twigs. Turn a sprig over: western hemlock needles are very short, in two lengths, with white bands underneath. Pacific yew needles are about an inch long, pointed though not sharp, with edges rolled under, and lighter green below but not white. Yew bears no cones; its single large seed sits in a small red berry-like aril, and OSU warns that the seed is poisonous.

Incense cedar vs western redcedar

So a wild cedar in a Washington forest is not an incense cedar; one in a Washington yard was planted. Redcedar’s care and problems are on the western redcedar page.

Is pine, fir or spruce wood heavier?

Pine and true fir are about the same, and spruce is lighter. In the Forest Service’s FIA reference tables, the four pines here range from 0.34 to 0.38 in specific gravity, the five true firs from 0.31 to 0.40, and both spruces are 0.33. The heavier woods belong to the look-alikes: western larch (0.48), Douglas fir (0.45) and western hemlock (0.42). Pacific yew, at 0.60, is the densest conifer in the site’s 46-species FIA extract.

Denser wood means a heavier log to haul; cord weights and heat by species are worked out in how much a cord of wood weighs.

Brown or dropping needles: normal or a problem?

Evergreen does not mean the needles last forever. WSU Extension forester Kevin Zobrist’s fact sheet on seasonal foliage loss describes the normal pattern: in the fall a conifer sheds its oldest, innermost foliage and keeps several years’ worth of newer needles. How many years depends on the species.

Source: WSU Extension FS056E (Zobrist, rev. January 2022), citing historical averages for western Washington. Checked 2026-10-02.

Pines make the fall drop easy to see, because their long needles and open crowns put the inside of the tree on display, and long-needled pines keep their foliage for a relatively short time. Western redcedar sheds whole branchlets at once, called flagging. In both cases the foliage that dies is the oldest, innermost growth.

Other patterns are not normal shedding. WSU’s fact sheet says a dead top could indicate severe drought stress, even thinning and yellowing through the whole crown may indicate root disease, damage to only the current year’s needles points to pests, pathogens or weather, and a conifer whose foliage all turns yellow, brown or red at once (larches aside) has died. The Oregon Department of Forestry names true firs, western hemlock and western redcedar as less drought-tolerant; its drought signs include a thinning crown that may start at the top, and top kill. The Forest Service’s risk-management guide also calls crown decline a symptom of extensive root loss; in Douglas fir, see laminated root rot. For the full set of checks, see how to tell if a tree is dead.

Dropping limbs is a different matter. The same Forest Service guide lists branch breakage from snow loading and windstorms as a defect of all conifers and flags spruces as shallow-rooted and susceptible to windthrow. How western hemlock’s shallow roots and Douglas fir’s root plate hold up in wind is covered in the Washington state tree guide.