How to Feed Citrus Trees

Citrus trees require regular feeding to thrive and regularly produce fruit. The feeding process is simple and is needed about three times a year. It's important to choose a fertilizer that has the right balance of nutrients for citrus. Plant food designed specifically for citrus trees works well, or choose any that has a 16-20-0 ratio of nitrous, phosphorus and potassium.

Difficulty: Moderately Easy

Instructions

Things You'll Need:

• Citrus plant fertilizer or 16-20-0 fertilizer
• Rake

1. Measure the circumference of the tree by wrapping a measuring tape around the trunk at a point about 6 inches above the ground.

2. Calculate the amount of fertilizer needed by dividing the circumference of the tree in inches by four. For example, if the circumference of the tree is 6 inches, divide six by four to arrive at 1.5. The total is the amount of fertilizer needed in pounds. In this example, 1 1/2 pounds of fertilizer will be required for a tree with a trunk circumference of 6 inches.

3. Spread the fertilizer evenly around the base of the tree, out as far as the edge of the longest branches.

4. Rake the fertilizer into the soil, working it into the top 1/4 inch of soil.

5. Water the tree immediately after applying the fertilizer to help it mix with the soil and prevent it from blowing away.

6. Repeat the feeding every February, May and August.

Tips & Warnings

• Reduce the amount or frequency of feedings if the fruit begins to have extraordinarily thick peels or if the tree still has deep green leaves when it is time for the next feeding.
• Don't over-fertilize. This can damage the citrus tree. It is better to use less fertilizer than to use too much.

References

• Orlando Sentinel - citrus gardening
• University of Arizona Cooperative Extension - fertilizing citrus