Growing citrus trees is incredibly rewarding, especially when you bite into a delicious slice of sweet, tangy fruit. Maybe oranges are your favorite citrus fruit, or maybe growing lemons is your cup of tea. Whatever type of citrus tree you prefer to grow, they all require nutrients to grow their best and produce fruit.
Mature citrus trees need three applications of fertilizer spread throughout the year. Fertilizer should be applied in winter, late spring and late summer. An easy way to remember when it’s time to fertilize citrus trees is by the holidays Valentine’s Day, Memorial Day and Labor Day.
Macronutrients. Citrus trees need nitrogen, phosphorus and potassium, which are called macronutrients. They are often referred to as NPK. Of these macronutrients, nitrogen is the most important for a healthy tree and a good citrus crop.
Fertilizers have three numbers listed on the labe, referring to the percentage of nitrogen, phosphorus and potassium they contain.