Why dark wood is at the heart of a tree trunk
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Walter Reeves answers Atlanta-area lawn and garden questions, including why many tree trunks have a dark core in the middle, and what to use in a butterfly puddle.
Why is the wood at centre of a tree trunk darker?
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United forever: heart with initials P+S in tree bark - a Royalty Free Stock Photo from Photocase
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City Trees - November/December 2023
![](https://northernwoodlands.org/images/made/images/articles/sapheart_600_399_65.jpg)
What Is the Difference Between Sapwood and…, Autumn 2007, Articles
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Tree trunk with sawn-off branch - Stock Image - B720/0037 - Science Photo Library
Black Walnut Trees (U.S. National Park Service)
![](https://www.photocase.com/photos/5143101-damaged-beech-trunk-partial-view-with-incised-name-paul-monochrome-photocase-stock-photo-large.jpeg)
Damaged beech trunk, partial view with incised name PAUL, monochrome - a Royalty Free Stock Photo from Photocase
![](https://cdn.britannica.com/80/65080-050-1528578B/slice-tree-trunk-eye-features-sections-transverse.jpg)
Wood - Strength, Structure, Uses
Northern Pecans: Natural limb pruning: Part 2
Why is the wood at centre of a tree trunk darker?
![](https://www.independenttree.com/wp-content/uploads/IT-Blog-Tree-wound-with-and-without-foam.jpg)
Tree Decay: Signs, Prevention and Treatment - Independent Tree
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Is this walnut tree healthy or not? (Is the dark spot inside heartwood, or something else?) : r/wood
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Heart Shape On A Tree Trunk Stock Photo - Download Image Now - 2017, Black Color, Brown - iStock
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Close-up of the sawn end of the branch of an unidentified tree, showing the heart wood (dark, centre), sap wood (light) and bark (rusty brown). Sap wo Stock Photo - Alamy