How to Tell if a Tree is Alive | Scratch Test Guide
How to Do a Scratch Test on a Tree or Shrub
A scratch test is one of the fastest ways to check whether a plant is still alive. The goal is simple: lightly remove a tiny bit of outer bark and look underneath. Green tissue usually means the plant is still alive. Brown, dry tissue usually means that section is dead.
What you need
Use a fingernail, pocket knife, or small pruners. Be gentle. You only need to remove a very small amount of outer bark.
- Use a small spot on a young twig or small branch first
- Scratch only the outer bark layer
- Do not gouge deeply into the stem
- Test more than one spot if needed
- Start near the branch tips, then work lower if needed
Close-up example of where to lightly scratch the bark on a young twig or small branch.
Step-by-step
Keep it simple. Check a small twig first, then move lower on the plant only if needed.
Choose a younger stem first. Avoid scratching the main trunk unless you need to. Start near the outer part of the plant and work inward.
Use your fingernail or a small knife to remove only a thin surface layer. You are not cutting deeply into the wood.
If the layer under the bark is green and moist, that section is alive. If it is brown, tan, or dry, that section is dead.
If the branch tip is brown, move farther down the stem and test again. Plants can have tip dieback and still recover from lower growth.
This section can be replaced later with a 4-photo strip using your own nursery photos for each step.
What the results mean
The tissue just under the bark tells you whether that section is still alive.
Green underneath
That section is alive. The plant may still be slow to leaf out, recovering from stress, or pushing new growth later.
Brown and dry underneath
That section is dead. Check lower on the stem before deciding the whole plant is gone. Sometimes only the tip or upper branch has died back.
Common mistakes to avoid
- Do not scratch too deep
- Do not test only one dead tip and assume the whole plant is dead
- Do not keep scraping the same branch over and over
- Do not confuse green bark color on the outside with living tissue underneath
- Do not panic if a stressed plant is slower to wake up than expected
What if the top is brown but lower branches are green?
That usually means there has been dieback in part of the plant, but it may still be alive lower down.
Can I do a scratch test on shrubs too?
Yes. The same idea applies to many shrubs and trees. Use a small stem first and keep the scratch minimal.
What if I am not sure what I am seeing?
Take a clear close-up photo of the scratched area and send it to us. We can help you look at it.
Need help checking your plant?
Send us photos of the plant, the scratched area, and the base of the trunk or stems. The clearer the photos, the faster we can help.