Fertilizing Blueberry Cultures After Year One

In March and July of the second year apply 2 ounces of 10-10-10 or 12-4-8 or 3 to 4 ounces of azalea special fertilizer (4-8-8). Never overfertilize; fertilizer damages blueberries easily until they are established. Spread the fertilizer evenly over a circle 24 inches in diameter with the plant in the center.

From the third season on, base the amount of fertilizer applied on the size of the bushes. If your soil tests high in phosphorus, use 12-4-8. If your soil tests low or medium in phosphorus, use 10-10-10. Use “premium grade” fertilizer if possible; this type contains micronutrients that may be needed. Apply 1 ounce of 12-4-8 or 10-10-10 per foot of bush height at the time of bud break in the spring and after harvest in the summer. Continue to increase the amount of fertilizer applied yearly until the bushes are 8 feet tall. Bushes 8 feet tall or taller should receive the maximum rate of 8 ounces of fertilizer per bush. Spread the fertilizer evenly under and around the bushes.

Because most Louisiana soils are low in magnesium, magnesium sulfate (Epsom Salt) may be necessary to obtain maximum plant growth. A soil test is the easiest means to determine the need for magnesium. When the calcium/magnesium ration exceeds 8:1, blueberry plants will likely respond to an application of magnesium.


Himelrick, David G. Home Blueberry Production in Louisiana. <http://www.lsuagcenter.com/NR/rdonlyres/D30270C0-F2DC-4B33-8AB7-036865AB6AAE/43117/pub1978HomeBlueberryProductionLOWRES.pdf>January 2008. Retrieved 03 March 2010.


From eXtension.org: bit.ly/M8Bylt 


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One Response to “Fertilizing Blueberry Cultures After Year One”

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