Girdling Roots
/GER-dling roots/🌲 Arboriculture●● Intermediate
Also known as: circling roots, stem-girdling roots
Girdling roots grow in a circular pattern around the trunk or other major roots instead of radiating outward. As both the root and trunk increase in diameter, the root compresses the trunk's vascular tissue (phloem and xylem), restricting the flow of water, nutrients, and photosynthates. Causes include container-grown nursery stock with circling roots, deep planting, and compacted soils.
Etymology
From Old English gyrdan (to encircle) + Old Norse rōt (root)
Example
“Symptoms of girdling roots include a flat-sided trunk, sparse canopy on one side, and early fall color.”