Yellowish Swiss Pine - Ask Extension
We have four Swiss Pine trees. Three of them are a nice green color and this one is yellowish. Any ideas what it may need? Also, there is no clear le...
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Yellowish Swiss Pine #878474
Asked July 23, 2024, 5:21 PM EDT
We have four Swiss Pine trees. Three of them are a nice green color and this one is yellowish. Any ideas what it may need? Also, there is no clear leader at the top. Should I try to do something with that?
Thanks!
Hennepin County Minnesota
Expert Response
We can't determine what's affecting the tree by viewing the photos.
However, based upon what we can see, tip blight might be present. This could account for dead and dying terminal growth on twigs and branches, especially near the top.
If tip blight is present, that may explain why the tree has no leader. Unfortunately, it won't be possible to address this problem until there is plenty of healthy new growth in the crown.
The following publication discusses tip blight and how to deal with it.
https://web.extension.illinois.edu/hortanswers/detailProblem.cfm?PathogenID=48
Several factors could account for the yellow (chlorotic) needles. The following publication discusses pine tree chlorosis. Although the information was prepared for Indiana residents, most of it also applies to Minnesota.
https://ag.purdue.edu/department/btny/ppdl/potw-dept-folder/2021/chlorosis-of-pine-trees.html
Here is a reply to a similar question from Michigan.
https://ask2.extension.org/kb/faq.php?id=238031
For a certain diagnosis, ask a certified arborist to assess the tree's health onsite and recommend a course of action.
If you decide to do that, this information may be useful:
https://extension.umn.edu/planting-and-growing-guides/how-hire-tree-care-professional
However, based upon what we can see, tip blight might be present. This could account for dead and dying terminal growth on twigs and branches, especially near the top.
If tip blight is present, that may explain why the tree has no leader. Unfortunately, it won't be possible to address this problem until there is plenty of healthy new growth in the crown.
The following publication discusses tip blight and how to deal with it.
https://web.extension.illinois.edu/hortanswers/detailProblem.cfm?PathogenID=48
Several factors could account for the yellow (chlorotic) needles. The following publication discusses pine tree chlorosis. Although the information was prepared for Indiana residents, most of it also applies to Minnesota.
https://ag.purdue.edu/department/btny/ppdl/potw-dept-folder/2021/chlorosis-of-pine-trees.html
Here is a reply to a similar question from Michigan.
https://ask2.extension.org/kb/faq.php?id=238031
For a certain diagnosis, ask a certified arborist to assess the tree's health onsite and recommend a course of action.
If you decide to do that, this information may be useful:
https://extension.umn.edu/planting-and-growing-guides/how-hire-tree-care-professional
Thanks for the quick reply!
