By Bert Cregg, Michigan State University Extension:
Often some fertilization is needed to produce high-quality field grown ornamentals and Christmas trees. Usually, growers want to improve characteristics such as growth or color. While soils in Michigan are sufficient to support plant growth, research and experience have shown there is potential to improve the quality of many tree species through fertilization. The first place to start with any nutrient management program is with a soil test.
Ornamentals and Christmas trees require 18 nutrients for healthy growth and productivity. The soil is a reservoir of these nutrients. Trees utilize these nutrients and they need to be replenished from time to time. By having your soil tested, you can learn which nutrients are present and which ones need to be added.
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