After initial spring growth, resources have been depleted and the tree is most vulnerable. Bark and cambium are also looser and easier to remove at this time than in fall. Girdled trees typically die slowly over several years, allowing understory species to adapt gradually to greater light levels.
How long does it take for a girdled tree to die?
Be patient when looking for the results, as the tree will appear fine until the need for nutrients from the roots becomes great in the following spring. Sometimes it might take two years for the tree to die.
Will a girdled tree survive?
A tree can usually survive if less than half its circumference is girdled. Even so, the area with the embedded material is weak and susceptible to breaking. The trunk can snap during an ice or wind event.