Minerals: A very common mistake that most gardeners make is to assume that all trees have the same needs when it comes to fertilizers. However, the truth is most brands of tree fertilizer are not sufficient citrus tree food. Citrus species all need micronutrients and they need a lot of them to grow and produce healthy fruit. Your citrus tree will also need base minerals such as phosphorus, nitrogen and potassium. But in addition to these it will also need other more specific minerals such as copper, boron, magnesium and zinc.

Mycorrhizal Fungi: This healthy fungus is what helps a tree pull nutrients from the soil. You may not need to add it into your soil if your citrus tree is planted in close proximity to other larger trees. However, if you are one of the many that are planting their tree into a container, then you will have to add the fungi. Mycorrhizal fungi can also be added again at a later date to improve your citrus tree food in the cooler months.

Iron Tablets: There is also one last element that is important to add to your citrus tree food and that is iron. To predict potential iron deficiency you will have to look closely at your citrus tree’s leaves. If they are pale yellow and seem to stop growing soon after they appear then you may have to add iron to your soil. Another way to check iron amounts is to test the PH level in your soil. If your soil reads as seven or higher, then you soil is too alkaline and your tree is not benefiting for the nutrients in your soil. If this is the case simply add some iron caplets to your soil.