Dead or Dormant: 6 Tests to Tell the Difference

The scratch test is the fastest way to check for life

The scratch test answers the question in under a minute. Use a fingernail or a small knife to scrape a nick in a twig, about pencil-thickness. If the layer just under the bark is green and moist, the twig is alive. If it is brown, dry, or crumbly, that twig is dead.

One dead twig does not mean the tree is dead. A tree can lose a few branches to winter dieback and still be healthy. Test several twigs from different parts of the canopy, including low branches and high branches. If most twigs show green, the tree is alive and dormant.

For a more reliable read, test a larger branch. Use a knife to scrape away a small patch of bark on a branch about an inch thick. Green, moist cambium below means that branch is alive. Brown, brittle cambium means that branch is dead. A tree can have dead branches and still be alive overall, so keep testing until you have a picture of the whole tree.

The bend test shows whether branches still have flexibility

The bend test is a second quick check. Take a small branch, about the thickness of a pencil, and bend it gently. A living branch bends and springs back. A dead branch snaps cleanly, often with a dry crack.

Do this on several branches across the tree. A tree in winter dormancy keeps some flexibility in its twigs. A branch that snaps like a cracker is dead wood. If nearly every branch you try snaps, the tree has little living tissue left.

The bend test works best in late winter, before buds break. During deep freeze, even living twigs can be brittle, so warm weather makes the test more reliable. If the ground is frozen and temperatures are below freezing, wait for a milder day.

Look for buds to confirm the tree is waiting, not dying

Buds are the clearest sign of life in a dormant tree. Check the tips of branches and the nodes where leaves attach. Dormant trees hold buds that are plump, firm, and often slightly pointed. Dead branches have no buds, or the buds are shriveled, dark, and fall off when touched.

Different trees hold buds at different times. Some, like maples and oaks, keep visible buds all winter. Others, like walnuts, may have smaller buds. If you see any healthy buds, the tree is alive and preparing for spring.

If you are unsure whether a bump is a bud or a scar, scratch it with your fingernail. A bud that is green inside is alive. A bud that is brown and dry is dead. Even a tree with many dead buds can survive if the trunk and main branches are alive, so combine this test with the scratch test.

Check the trunk and roots for signs of life

The trunk and the base of the tree tell you more than the branches. Scrape a small patch of bark on the trunk, about chest height. Green, moist cambium means the trunk is alive. Brown, dry cambium means that section of trunk is dead. Test a few spots around the trunk, because damage can be one-sided.

Look at the base of the tree for new shoots or suckers. A tree that is dying above ground may still push out sprouts from the roots. Those sprouts mean the root system is alive, but the tree may not recover its former shape. A tree with live roots but a dead trunk is often a hazard, because the trunk can fail without warning.

Check the soil around the base for cracks, heaving, or fungal growth. Mushrooms growing at the base can indicate root rot, which can kill a tree even when the upper branches look alive. If you see fungal conks, the tree may be structurally unsound.

Do the tests at the right time of year

The best time to test is late winter, just before bud break, because a dormant tree is still fully leafless and the tests are easy. In early winter, a tree may still be losing leaves, and in deep freeze, the bend test is less reliable. In early spring, you can simply wait for leaves to emerge.

If you test in late winter and see green tissue, the tree is dormant and will leaf out when temperatures warm. If you test in early spring and see no green anywhere, the tree is likely dead. But even a tree that appears dead in early spring can surprise you, so wait until leaves should be out in your area, usually by mid-May in Spokane, before making the final call.

If the tree has not leafed out by late spring, it is dead or nearly so. A tree that is alive but struggling may leaf out late, but a tree with no leaves by early summer is beyond recovery.

When to call for a professional assessment

If the tests show no green anywhere, or if the trunk and main branches are dead, the tree is dead and should be removed. A dead tree is a hazard, especially in a windstorm, because the wood becomes brittle and branches can fall without warning. If the tree is near your house, driveway, or power lines, schedule removal soon.

If you are unsure, call a tree service for an on-site assessment. A professional can test the tree with more tools, such as a resistograph, and can check for internal decay that you cannot see. Ask what the assessment will include and what it will cost before the visit.

If the tree is alive but has large dead branches, those branches should be pruned to prevent breakage. A tree with more than 50% dead crown may not recover, and removal may be the safer option. A professional can tell you whether the tree can be saved or should come down.

Green under the bark means the tree is waiting, not dead.

Short version: how to tell if your tree is dead or dormant

• Scratch a twig: green and moist means alive, brown and dry means dead.
• Bend a twig: it snaps if dead, springs back if alive.
• Look for buds: plump and firm means alive, shriveled means dead.
• Test the trunk: scrape bark, check for green cambium.
• Wait until late spring: if no leaves by then, the tree is dead.