Because the Indian Hawthorn tree blooms in the spring, it requires a full fertilizer to ensure that the flowers bloom. The fertilizer can be a combination of a 16-4-8 nitrogen-phosphorous-potassium blend or a 12-6-6 or 12-4-8 nitrogen-phosphorous-potassium blend. It is recommended that you apply a full fertilizer to the water supply once a month or so.

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