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Citrus Tree Fertilization Base Nutrients

Updated on March 14, 2011

It is very important to know the right quantity of base nutrients to apply to a citrus orchard so it can grow healthy to supply you with a good commercially sell-able and profitable harvest.

Amongst other factors like your orchard location, orchard age, variety chosen, weather conditions, soil quality, water quality, irrigation system and so on, correct citrus orchard fertilization does not mean adding more tons of fertilizer other than recommended.

Too many nutrients can stress out your citrus orchard and thus give you a low yield and at times over sized fruits that are not commercially sell-able.

A carefully guided and well distributed base nutrient mix year round will guarantee you good yields, healthy productive citrus trees and in turn save you money. Just follow the tables below.

Annual Base Fertilizer (NPK) Necessities (in grams per tree/year) According to Age.

Tree Age
Nitrogen (N)
Phosphorus (P)
Potassium (K)
1-2
40-80
10-20
10-30
3-4
120-160
30-40
40-80
5-6
240-320
50-60
100-120
7-8
410-500
80-100
160-200
9-10
550-600
120-150
250-300
10 +
600-800
150-200
300-400

A good citrus care yields a good crop

Just above you have the base nutrient quantities according to tree age. Now one important thing to keep in mind is when to start applying throughout the year the necessary amount according to tree fructification, sap circulation, fruit maturation and so.

The table below will give you a percentage idea to be given throughout the year and the best month to start applying those same base nutrients.

Month
Nitrogen (N)
Phosphorus (P)
Potassium (K)
March
10%
10%
5%
April
10%
20%
10%
May
15%
15%
15%
June
20%
15%
15%
July
20%
15%
25%
August
15%
15%
20%
September
10%
10%
10%

Applying foliar fertilization in citrus trees should be looked upon as a complement for emerging and correcting nutrient deficiencies, but never as a substitute.

Presuming your installed irrigation is of the drip system type and base water soluble nutrients are pumped via that same system, pending on soil characteristics and inter reaction with nutrients, some form of deficiencies can develop.

Regular inspection of citrus tree leaves can tell whether or not you need to apply foliar fertilization in order to correct the deficiency.

After acquiring the nutrient(s) from your supplier be sure to follow the manufacturers recommended concentration amounts when doing the mix with water and if you are applying more than one nutrient in the same go, be sure they are compatible with each other.

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      Brooke Bowen 

      3 years ago

      My husband and I just recently started growing a couple citrus trees in our yard. We love them in our back yard and think they add so much. We want to make sure that we take the best care of them while they grow. This was incredibly helpful. Thanks!

      Brooke Bowen http://www.treeandstumpremovalrichmond.com/tree-fe...

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