Are you noticing that your river birch, oak or red maple tree don’t look as lush as they normally do? Are the leaves showing fall colors already and starting to drop? If it were fall, this would be expected. However, since it is still summer, these signs can indicate a larger problem. Many times what you are seeing is the effect of chlorosis, where the soil lacks nutrients or the pH level does not allow the tree to absorb the nutrients it needs. Chlorosis starts out mild, but if left untreated, it can become severe and stress the tree. The more stressed the tree, the more susceptible the tree can be to pests and other diseases. If you suspect chlorosis, please contact our Plant Health Care Department. One of our Certified Arborists® can confirm the diagnosis and give their best recommendation for treatment.
During the fall, we complete many Verdur trunk injections along with a Cambistat soil application. Verdur will give the tree the iron and nutrients it might be missing to help keep the leaves green and remain on the tree. Cambistat will help slow the canopy growth, so the tree can put its energy into making healthier leaves and promote root growth. The combination of these two applications can help the tree become more viable and durable. These applications are done in the fall so that next spring, when the tree starts to bud, it has all the resources it needs to be a lush green tree. A Verdur/Cambistat application can last for approximately 3 years.
As trees are preparing for winter, we also recommend a fall BioGreen soil application. BioGreen is an organic soil conditioner and fertilizer that can be applied anytime. Along with the BioGreen, Imidacloprid soil applications are also suggested. Imidacloprid can take some time to get to reach the crown of the tree, so for those early season wood boring or leaf feeding insects, a fall Imidacloprid application is recommended.