Shagbark Hickory with Base Rot: Should You Remove It?

Three shagbark hickories show rot at the base (about 15% of circumference). Opinions differ: some say cut them down; others say they're stable. The trees have healthy foliage.

Understanding Heart Rot

Decay fungi enter through wounds and digest dead heartwood. The living cambium just under the bark remains functional, so the tree can appear healthy while the core hollows. Hickory's dense wood decays slowly.

Risk Assessment

• Structural strength: A hollow cylinder is nearly as strong as a solid one—until decay reaches major limbs.
• Failure timeline: Large limbs may break in storms years or decades later, or never.
• Current health: Green, full foliage indicates the tree is still vigorously transporting water and nutrients.

Recommendation

Do not remove the trees now. Monitor annually for:

• New limb dieback or breakage at the trunk.
• Expanding decay cavities or fungal conks.
• Leaning or soil heaving at the base.

If the trees are in a low-risk area (away from structures, play zones), they can remain for many years. Re-evaluate if large limbs start failing.