Trees are often home to more than just leaves and branches. From mushrooms to vines, various growths can appear on or around your trees, raising the question, “What’s growing on my tree”. While some of these growths are harmless, others could indicate underlying issues that need attention. In this guide, we’ll explore common growths like mushrooms, moss, lichens, and vines, their impact on tree health, and what you can do to manage them.
1. Mushrooms and Conks
The presence of mushrooms or conks on a tree is often a warning sign of decay. Conks growing on the tree’s exterior indicate internal decay, while mushrooms on the ground can signal root rot or root collar decay. If you notice any mushrooms or conks on your tree, it’s crucial to contact an arborist immediately.
To assist with proper diagnosis, collect the mushroom and store it in a paper bag in the refrigerator so it can be sent to a lab for identification. While most fungal pathogens causing decay aren’t treatable with chemicals, maintaining the tree’s overall health and vigor can help it tolerate some fungal activity. However, some fungal infections can lead to complete tree failure within a few seasons, making quick action essential.
2. Moss
Moss, a non-vascular plant, thrives in high humidity and moisture. It can grow directly on trees or in the surrounding soil, especially in poorly drained or compacted areas. While moss doesn’t harm trees directly, its presence may indicate irrigation issues, such as water splashing on the trunk, or other soil problems.
In most cases, controlling moss isn’t necessary. Treatments like lime applications can drive soil pH too high, harming the tree by limiting nutrient availability. Instead, consider natural solutions like mulching or increasing light and air penetration around the tree to discourage moss growth.
3. Lichens
Lichens, a common sight in spring and late fall, appear as light green blotches on tree trunks and larger limbs. They consist of fungi and algae growing together symbiotically and rely on high moisture levels for growth. During hot, dry periods, lichens become dormant, making them more noticeable.
Fortunately, lichens are harmless to trees. They grow on various surfaces, including rocks, and derive nutrients from the air. In fact, lichens are often a sign of good air quality. However, if you notice large populations of lichens on your tree, it may indicate that the tree is not growing vigorously. An arborist should assess the tree for any underlying health issues.
4. Vines
Vines can pose significant challenges for trees. They may alter wind-loading patterns, girdle stems, and compete with trees for water and nutrients. More concerning, vines can obstruct a tree inspection by masking weak or poorly attached limbs, which could fail unexpectedly.
To manage established vines, avoid pulling live vines off the tree, as this could damage the bark or cause limbs to fall. Instead, cut the vine near its base, treat the cut locally with an herbicide, and allow the vine to die before removing it in sections. Maintaining a clear buffer around the tree base and preventing vines from climbing the stem is the best way to protect your trees.
Partner with Tree Docs for Tree Health Support
Understanding what’s growing on or around your tree is key to ensuring its health and longevity. While some growths like moss and lichens are harmless, others, like mushrooms and vines, can signal serious issues. If you’re unsure about a growth on your tree or need professional advice, contact Tree Docs today. Our team of certified arborists is here to help you assess, maintain, and protect your trees for years to come.
