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  1. Ammonium Sulfate 21-0-0 FAQ 1. Is Ammonium Sulfate fertilizer good for tomato plants? We recommend using Greenway Biotech, Inc. Tomato Fertilizer for tomato plants since that was specifically formulated for maximum yield for tomato plants. However, if you are using dry granular fertilizer then you should apply Ammonium Sulfate at the rate of 1 tablespoon per plant. Make sure not to over apply because Nitrogen fertilizers could kill plants easily. 2. Is Ammonium Sulfate fertilizer good for blueberries? Yes, the best ki...