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The Best Citrus Fertilizers

Citrus trees have somewhat unique fertilizing requirements as they need a complete fertilizer with nitrogen, phosphorus and potassium in addition to a range of micro or trace nutrients including magnesium, manganese, copper and boron. Citrus fertilizers also use slow release nitrogen formulations to feed the tree lightly over time and not disrupt flowering and fruiting. To incorporate this need for slow release feeding, citrus fertilizers are usually granular in form and are applied lightly several times over the course of the year.

Organic Citrus Fertilizer

Espoma Citrus-Tone is an organic fertilizer designed for use on citrus and avocado trees. It contains a combination of slow and quick release nitrogen, phosphate, potash, calcium, magnesium and sulfur from organic materials including poultry manure, cocoa bean meal, bone meal, alfalfa meal and greensand. It has a guaranteed analysis of 5-2-6.

Synthetic Citrus Fertilizer

Scotts MiracleGro Shake 'n Feed Citrus Fertilizer can be used on citrus trees, palms, mangoes and avocados. It is a slow release granular formulation that combines chemically formulated nutrients including magnesium and iron in a 10-15-15 analysis. It is manufactured to dissolve slowly in the soil to feed the trees for up to three months at a time.

Fertilizer Tree Spikes for Citrus

Tree spikes are a common form of fertilizer for a range of trees and some prefer the ease of application to drive a few spikes into the soil versus spreading a granular formulation. Jobe's Fruits & Citrus Tree Spikes is a synthetic fertilizer product designed for fruit, citrus and palms that has a guaranteed analysis of 10-15-15 and has the added benefit of being used on your citrus and other fruit trees.

Time To Fertilize With Natural Fertilizers For Citrus Trees?

Make sure you choose the right fertilizer for your citrus. All fertilizers, natural or synthetic, show information about the nutrients contained. The significant difference between synthetic fertilizers and natural fertilizers is synthetic fertilizers are derived from chemical sources, which are listed on the label. Bone meal, blood meal, cottonseed meal, bird guano, animal manure and fish emulsion are some of the natural fertilizers sold at garden centers. Natural fertilizers are slow acting because they need to be broken down into vital nutrients by bacteria before they're absorbed into the soil. Citrus in USDA zones 8 to 10 tend to flower year-round, with the heaviest flowering in early spring, following a winter rest period, which is not a true dormancy. First-year trees should receive 1/2 to 1 pound of fertilizer five to six times per year, for a total of 3 to 6 pounds per year. You can follow your first-year schedule, but give your tree its final fertilizing in September to help it through the last part of the year. If your citrus is planted in a lawn area, near ornamental plants, close to other trees, planted in an area that’s heavily watered, or you notice deficiencies in the color or number of leaves, see cracked bark or other signs of marginal health, the tree probably needs more nutrients and you should add an extra application.

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