Knowing when and how to fertilize the trees on your property can be tricky. Many trees will thrive without needing any fertilization, while others may need to be fertilized every year. There are many factors to consider when it comes to tree care, so here are some basic tips to help you decide when and how to fertilize your trees.
Look for Signs of Poor Health
A tree usually needs to be fertilized if it isn’t receiving enough nutrients to stay healthy. Signs of poor tree health include chlorosis (yellowing of the leaves), shorter twig growth, and smaller leaves. Many tree disorders have these symptoms, so test the soil around the ailing tree or call an arborist to make sure that nutrient deficiency is the real culprit.
Test the Soil
Before you apply any fertilizer, test the soil surrounding the tree. Not only will this confirm whether or not the tree needs to be fertilized, but it will tell you exactly what kind of fertilizer to use. Most basic tree fertilizers contain only nitrogen, phosphorus, and potassium. These are all important macronutrients, but they won’t help you if your soil is lacking in micronutrients or secondary nutrients like magnesium and iron. You can find an affordable soil test at most garden stores or tree services.
Apply a Slow-Release Fertilizer
For most trees, a slow-release, low-salt fertilizer is best. A slow-release fertilizer will release nutrients over an extended period of time and reduce the chance of the tree developing fertilizer burn. Fertilizer burn occurs when the salts in a fertilizer draw water out of a tree’s roots, drying it out and giving the leaves a “burned” look.
Know How Much Fertilizer to Use
Once you know what kind of fertilizer you need, your next step is figuring out how much you need to use. If you’re using slow-release fertilizer, apply 2 to 4 pounds for every 1,000 square feet of root area. If you’re using a quick-release fertilizer, only apply 1 to 3 pounds. Keep in mind that different tree species have different needs, so do plenty of research to make sure you’re applying the right fertilizer.
Fertilize in the Spring or Fall
Fertilizing a tree in the spring is usually best since that’s when new leaves grow, but fertilizing in the fall can also help an ailing tree recover some of the nutrients lost during the summer. In any case, make sure that you water your freshly fertilized trees adequately, and do not fertilize a tree within its first year of planting.
Fertilizing a tree can be important for its health if it isn’t receiving enough nutrients, but there may be other factors affecting a tree’s health. If you follow these tips and you’re still having trouble with your trees, don’t hesitate to call a tree care service for assistance. When you need fertilization services in Birmingham, AL, contact Gray’s Tree Service.
