In most cases, the most important nutrient for a
Red maple is nitrogen, but that does not mean that phosphorus and potassium are unimportant. On the contrary, your
Red maple likely needs a decent amount of all three main nutrients, which is why a balanced fertilizer, such as a 10-10-10, can work well.
However, a more nuanced ratio of nutrients often leads to optimal growth for a
Red maple. Often, fertilizers that are a bit higher in nitrogen work a bit better. For example, a ratio of 10-6-4 can often work well. When fertilizing, you can use a granular fertilizer or a liquid-based one.
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