How to Fertilize Blueberries: Ammonium Sulfate

Blueberry bushes, common in the home landscape, produce edible berries in the spring and summer. Although most blueberries thrive in cold Northern climates, some varieties, such as Rabbiteye, grow in the South. Blueberry bushes are fussy about their soil, so fertilizing after planting is important. The best fertilizer is one that contains ammonium sulfate, which supplies necessary nitrogen to the plant.

Ammonium sulfate fertilizer
Water

Instructions

- 1
  Wait until the fall after the blueberry bushes are at least a year old before you begin applying fertilizer. Most bushes do not produce fruit the first year, so not fertilizing doesn't impact fruit production.
- 2
  Apply 1 oz. of ammonium sulfate around the soil of each blueberry bush, sprinkling it out as evenly possible to the length of the longest branch.
- 3
  Water the soil well after applying the ammonium sulfate to soak it down near the blueberry bush roots.
- 4
  Wait until the following fall and reapply the ammonium sulfate in the same manner, but increase the amount to 2 oz. per blueberry bush. Water after the application to dissolve the granules.
- 5
  Continue applying the ammonium sulfate fertilizer in the same way on an annual basis, increasing the amount by 1 oz. per bush each year. When you reach 1/2 lb. of fertilizer per bush, continue applying it at that rate from then on, with no further increases.

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