How To Get Rid Of Lichen And Moss From Backyard Trees

The presence of lichen or moss on backyard trees can understandably be concerning at first. Lichen is a combination of algae and fungus that lives on any number of solid, undisturbed surfaces, including trees and rocks. These grayish-green to reddish-colored growths can be flat or raised and can sometimes look crusty. Moss is green and fuzzy, and it can also grow on barks of trees without disturbing them. It thrives in heavily moist and shady environments but is not in itself harmful. While lichen and moss are not directly harmful to your trees, you can get rid of them by physical removal, but many experts recommend you let them be.

Alternatively, while lichen and moss are sometimes incorrectly blamed for killing trees, supporting overall tree health may help get rid of them. If the tree in your backyard both looks unhealthy and is covered with lichen or moss, chances are the tree is in poor health for other reasons. Ideally, you will want to follow helpful tips to ensure you're buying a healthy tree before ever planting it on your property. However, if you have older trees, or if you live in a home where trees were planted before you moved in, you will now need to make sure you are taking the right steps to support existing tree health. This includes adequate water, fertilizer, mulch, pruning, and overall disease and insect management. Once you have supported the health of your trees, lichen and moss may be less noticeable.

There are a few ways you can physically remove lichen and moss. With lichen, you can apply a soapy solution and gently scrub the tree bark with a soft-bristled brush before rinsing it off. You can also use a brush to scrub off moss, or you may consider using a pressure washer to help get rid of it. Another option is to thin out some of the branches of the affected tree and prune your trees the right way without calling a pro. This will help to increase air circulation and subsequently reduce new lichen and moss from growing on the bark.

Again, removing moss and lichen from trees isn't usually necessary. In fact, both lichen and moss provide oxygen and are actually signs of good air quality in your area. This is why you're more likely to find trees with these growths in forests and rural communities compared to cities and heavily industrialized areas. Furthermore, lichen also helps support hummingbirds, caterpillars, and certain moths. 

If you are getting ready to sell your home and are concerned about the cosmetic appearance of your backyard trees, you may consider discussing this with a realtor before removing harmless lichen and moss. This includes any lichen and moss on smaller trees in your yard.