How to calculate the amount of navel orange fertilizer needed to strengthen the orange tree
To adjust the amount of citrus nutrients more precisely, the required nutrients can be calculated according to the age and conditions of the trees.
For young trees outdoors, mix 1 to 4/4 cups of phosphate fertilizer into the soil at planting time. Every three to four years, trees need more phosphorus than the mentioned amount, which can be solved by applying fertilizers with higher phosphorus percentage.
While citrus trees need nitrogen fertilizers every year. A tree that is one to three years old needs 1/4 to 1/2 pound of actual nitrogen per year. Ammonium sulfate contains 21 percent nitrogen.
so you need 2-1/3 to 3-1/2 pounds of fertilizer. By the time a citrus tree is five to six years old, most will need 1.4 to 1.2 pounds of actual nitrogen per year.
Ideal time for orange fertilizer
Fertilization of citrus trees starts at the end of the year (end of autumn and beginning of winter). If you decide to use citrus fertilizers.
proceed according to the instructions on the fertilizer label. If you calculate the nutritional needs of your trees, divide the required amount of nitrogen by 3 and make one third of it available to the plant in January and February, another third in April and May, and the remaining one third in August and September.
The required micronutrients may be present in the soil, but pay attention to the symptoms of micronutrient deficiency on the tree. Yellowing of young leaves or pale yellow foliage with bright green veins can be a sign of magnesium, iron or zinc deficiency.
Home grown orange tree fertilizer
The nutritional needs of a citrus tree grown indoors or even in a pot are the same as those grown outdoors. Both need regular feeding of nitrogen and micronutrients.
with the difference that only the amount of fertilizer used is different. For home citrus trees, you can use plant fertilizers that release nutrients slowly and make them available to the plant.
It is worth noting that the used fertilizer contains micronutrients such as iron, magnesium, zinc and boron.
Nitrogen performance in orange trees
Nitrogen is the element that has the greatest impact on the production of citrus fruits, and by nature, citrus trees need nitrogen more than other nutrients. Nitrogen is a component of chlorophyll .
(the green pigment found in leaves) and is associated with important tree functions such as growth, leaf production, flower initiation, fruit initiation, fruit set, and fruit growth and quality.
Nitrogen deficiency causes the green color of the leaves to disappear, resulting in uniformity. The lack of nitrogen in the spring causes the leaves to become pale and small.
The old leaves are shed early in the season and cause the foliage to become thin and the branches of the tree to become dry. The growth of the tree is weakened.
and the yield is reduced due to the production of weak fruits and small drooping fruits.
Nitrogen poisoning (too much nitrogen)
Too much nitrogen reduces the quality and shelf life of fruits. Fruits become large and puffy, maturity is delayed and foliage regrowth is increased. The tree bark becomes brittle and brittle, subsequently the plant becomes very sensitive to pests and diseases.