Topping a tree, which involves cutting off a significant portion of its upper branches, does not directly stop root growth. Topping has several negative effects on the overall health and structure of the tree.
Here are the effects that can indirectly impact root growth…
- Reduced Photosynthesis – Topping removes a large portion of the tree’s canopy, which significantly reduces its ability to photosynthesize. Reduced photosynthesis can lead to decreased production of energy, limiting the resources available for root growth.
- Stress and Weak Regrowth – Topping causes stress to the tree and stimulates the growth of weak, poorly attached shoots known as water sprouts. These new shoots are more prone to breakage and may not contribute to the tree’s stability. The overall stress can affect the tree’s ability to allocate resources for root development.
- Increased Vulnerability to Pests and Diseases – Topped trees are more susceptible to pests and diseases. The open wounds created by topping provide entry points for pathogens and insects, potentially compromising the tree’s overall health, including the health of its roots.
- Decay and Structural Issues – Topping often results in large, open wounds that take a long time to heal. These wounds are more susceptible to decay, and the decay can extend into the trunk and roots, affecting the structural integrity of the entire tree.
While topping may not directly stop root growth, it negatively impacts the tree’s overall health and resilience. Trees respond to topping with stress, decay, and the development of structurally unsound regrowth, which can indirectly affect root development. Topping is considered a harmful and outdated practice, and alternative pruning methods, such as crown reduction and thinning, are recommended for maintaining tree health and structure. If a tree requires significant height reduction or pruning, it is advisable to consult with a certified arborist to determine the best course of action.
